All tools
919 tools in 22 categories: 798 free, plus 106 Pro and 15 Business tools you can try free daily. Most run entirely in your browser.
JSON & data formats 15
- JSON Formatter Pretty-print, minify and fix JSON with exact error locations.
- JSON Validator Strict JSON validation with exact error locations and every path listed.
- CSV to JSON Converter Two-way CSV ⇄ JSON with delimiter detection, safe typing and a preview table.
- XML Formatter Pretty-print or minify XML and find syntax errors by line and column.
- JSON Viewer & Tree Editor Browse, search and edit big JSON files in a fast tree — and copy any path.
- JSON ↔ YAML Converter Two-way JSON ⇄ YAML conversion that keeps numbers exact and warns about YAML traps.
- YAML Validator & Formatter Find YAML errors by line, catch YAML 1.1 traps, check Compose and Actions files, format.
- XML ↔ JSON Converter Two-way XML ⇄ JSON with control over attributes, arrays and namespaces — XXE-safe.
- JSON Schema Validator Check JSON against a schema and get every error with its path, line and a clear fix.
- JSON Diff & Compare Structural JSON compare with JSON Patch and Merge Patch export — and apply patches too.
- TOML ↔ JSON Converter Exact TOML ⇄ JSON / YAML conversion, with errors that name the rule and the line.
- XSD Validator Check XML against an XML Schema and get every error with its line, path and a clear fix.
- JSON Schema Generator Paste JSON samples and get a JSON Schema that accepts them, ready to refine.
- JSONPath & JMESPath Tester Standard JSONPath and AWS-style JMESPath queries, evaluated live on your JSON.
- JSON Repair Tool Turns almost-JSON into valid JSON — and shows exactly what it changed.
Formatters & minifiers 8
- SQL Formatter Readable, consistently indented SQL for 20 dialects — or a safe one-line copy.
- HTML Formatter Indent messy markup cleanly, or minify it without breaking pre, textarea or scripts.
- CSS Formatter Pretty-print CSS for reading, or minify it for production — without breaking it.
- JavaScript Formatter Turn minified or messy JavaScript into readable, consistently indented code.
- JavaScript Minifier Shrink JavaScript for production with Terser, in your browser, with a source map.
- CSS Toolkit Four everyday CSS jobs in one place: specificity, validation, media queries and variables.
- JavaScript Obfuscator Make JavaScript hard to read: renamed names, encoded strings, flattened control flow.
- Code Formatter (TypeScript, Vue, Markdown & more) Prettier for 18 languages — auto-detected, configurable, with a diff of every change.
Encode, decode & hash 9
- Base64 Encoder & Decoder Text and files to Base64 and back — UTF-8 safe, URL-safe, data URIs.
- URL Encoder & Decoder Percent-encode and decode safely, and see every part of a URL.
- JWT Decoder Read any JWT and check its signature — without sending the token anywhere.
- Hash Generator Hashes and HMACs of text or huge files, plus checksum verification.
- Text to Binary & Hex Converter See the exact bytes behind any text, and turn binary or hex dumps back into text.
- HTML Entity Encoder & Decoder Escape text for HTML, or decode &, © and → exactly as a browser would.
- Encoding Toolkit (All-in-one) Every encoding side by side — paste anything and it works out how to decode it.
- JWT Encoder & Signer Sign a JWT with any standard algorithm — the key never leaves this page.
- CRC Calculator (CRC-8/16/32/64) Every catalogued CRC, custom parameters, checksums and C code — for text, hex or files.
Code converters 9
- JSON to TypeScript Paste JSON, get TypeScript types (and a Zod schema) that fit every sample.
- Markdown to HTML Markdown (or BBCode) in, clean and safe HTML out — with a live preview.
- JSON to Go Struct Paste JSON, get Go structs with json tags that unmarshal it.
- JSON to C# Class Paste JSON, get C# classes with the right serializer attributes.
- JSON to Java Class (POJO) Paste JSON, get Java classes (one file each) that Jackson can read.
- cURL to Code Converter Paste a curl command, get the same request in your language.
- JSON to Code Generator Paste JSON, get model classes for Python, Kotlin, Swift, Dart, Rust and 19 more.
- HTML to JSX Converter Paste HTML or SVG, get React JSX that renders exactly the same.
- Docker Run to Docker Compose Converter Paste docker run commands, get a Compose file — or turn a Compose file into commands.
Test & debug 8
- Regex Tester Live matches, capture groups and replace preview — safe from runaway patterns.
- User Agent Parser See which browser, OS, device or bot sent a request: one user agent or a whole log.
- JavaScript Keycode Finder Press a key: get its key, code and keyCode, plus listener code ready to paste.
- REST API Tester (Online API Client) Pro tool A Postman-style API client in this tab — requests go straight from you to the API.
- Card & Check-digit Validator Is the number well formed? Luhn, GS1 and ISBN check digits, worked out step by step.
- OpenAPI / Swagger Editor & Validator Paste an API description: see every problem by line, the API reference and curl commands.
- Hex Viewer & File Inspector A private hex viewer for files of any size, with a data inspector and file-type detection.
- WebSocket & SSE Tester An online WebSocket and event-stream client — straight from your browser to your server.
Editors & playgrounds 4
- HTML, CSS & JS Playground (Online Editor) Pro tool A CodePen-style editor with live preview and console — private, sandboxed, no sign-up.
- JavaScript & TypeScript Online Compiler Write, run and debug JS or TS snippets — safely sandboxed, nothing to install.
- Python Online Compiler Real CPython in your browser — with stdin, files and a stop button.
- SQLite Online (SQL Playground) Pro tool A full SQLite database in your browser — open, query, import, export.
Generators 8
- UUID Generator Random v4 and time-ordered v7 UUIDs, in bulk — plus a UUID inspector.
- Password Generator Strong random passwords and passphrases, generated only on your device.
- Code Screenshot Generator Carbon-style code images with VS Code themes — made in your browser.
- .gitignore Generator Combine official templates, add your rules, and check any path the way git does.
- Cron Expression Generator & Explainer Write, check and translate cron schedules — and see exactly when they run.
- NanoID, ULID & Snowflake ID Generator Every popular ID format in bulk — and the creation time inside the ones you already have.
- Random String & Code Generator Unique coupon, voucher and invite codes, PINs and test IDs — up to 100,000 at a time.
- Apache .htaccess Generator Pick what your site needs and get a commented .htaccess file, with the modules it needs.
Calculators & reference 7
- Timestamp Converter Epoch time ⇄ readable dates in any time zone, with daylight saving handled.
- Color Converter Every color format at once, with WCAG contrast checks, tints and shades.
- Chmod Calculator Work out chmod numbers, symbolic modes and umask results, with warnings for risky modes.
- HTTP Status Codes Reference Every HTTP status code explained: what it means, why you got it and how to fix it.
- MIME Type Lookup The right Content-Type for any file — and whether a file really is what its name says.
- Programmer Calculator (Bitwise) Bitwise maths at a real bit width — with overflow, endianness and every base at once.
- IEEE 754 Floating-Point Converter See exactly how a number is stored in binary floating point — every bit, every digit.
Open & edit files 3
- CSV Editor & Viewer Open, fix and save CSV files in a spreadsheet grid — large files included.
- Excel Viewer (XLSX, XLS, ODS, Numbers) Open any spreadsheet without Excel — every sheet, formula and comment, nothing uploaded.
- Large CSV File Viewer Pro tool Open CSV files of several GB: jump to any row, filter them, export a part.
Convert data 9
- Excel to CSV Converter Turn any sheet into clean CSV — every sheet at once, title rows and merged cells fixed.
- CSV to Excel Converter CSV to .xlsx without losing leading zeros, phone numbers or long IDs.
- HTML / Web Table to CSV & Excel Copy a table from any web page, Word file or Wikipedia article — get clean CSV or Excel.
- CSV to SQL Converter Typed CREATE TABLE and batched INSERTs, upserts or bulk-load scripts for six databases.
- Excel to JSON Converter Spreadsheet rows to clean, typed JSON — header row as keys, dates as ISO 8601.
- JSON to Excel Converter API responses and nested JSON to a clean Excel workbook — one sheet per list.
- PDF Table to Excel / CSV Pro tool Box the table once — get every page of it as one clean spreadsheet.
- Table Converter Paste a table in any common format, tidy it in a grid, export it in 29 formats.
- Spreadsheet Format Converter (XLS, XLSX, ODS, Numbers) Change a workbook’s format — and see exactly what carries over before you convert.
Clean & transform 4
- Remove Duplicate Rows (CSV/Excel) Find and remove repeated rows by the columns that matter, with a file of what was removed.
- CSV Column Mapper Fit an export to an import template — or pick, rename and reorder its columns.
- Text to Columns Excel’s Text to Columns, online: split lines or a column, then paste back into a sheet.
- CSV Transpose & Unpivot Flip rows and columns, or reshape wide ↔ long — then paste straight back into Excel.
Merge, split & compare 4
- CSV & Excel Splitter Pro tool Cut big CSV and Excel files into smaller ones, header repeated in each.
- CSV & Excel Merger Pro tool Stack CSV and Excel files into one table, with columns lined up by name.
- Compare Two Excel or CSV Files Pro tool See exactly which rows were added, removed or changed between two spreadsheets.
- Join CSV/Excel Files (VLOOKUP Online) Pro tool VLOOKUP for whole files: bring columns from one table into another by a key.
Charts & graphs 7
- Chart Maker (Graph from Data) Paste a table, pick a suggested chart, download it — all in your browser.
- Bar Graph Maker Grouped, stacked, horizontal and diverging bar charts from your numbers.
- Line Graph Maker Line and area charts on a real date axis, with notes and moving averages.
- Pie Chart Maker Pie and donut charts with clear labels, percentages and an “Other” slice.
- Scatter Plot Maker Scatter and bubble charts with trendlines, their equations and R².
- Venn Diagram Maker Paste lists or type set sizes: every overlap counted, listed and drawn.
- Word Cloud Generator Word clouds from text or word lists, in any shape, with PNG, SVG and CSV export.
Tables & templates 4
- LaTeX Table Generator Edit a table like a spreadsheet and get clean LaTeX code with the packages it needs.
- HTML Table Generator Spreadsheet-style editing, accessible table markup out — styled, responsive and sortable.
- Markdown Table Generator Spreadsheet-style editing for GitHub Markdown tables, with a live preview.
- Mock Data Generator Pro tool Design the columns, link the tables, and download up to a million rows of test data.
Count & measure 7
- Word Counter Live word, character and sentence counts with reading time.
- Character Counter Live character counts with X, SMS, search and social media limits.
- Sentence Counter Every sentence with its word count, plus average, median and long-sentence flags.
- LLM Token Counter Exact token counts for OpenAI and open models — your text never leaves the browser.
- Reading Time Calculator How long your text takes to read or say — and how many words fill a 5-minute talk.
- Syllable Counter & Haiku Checker Syllables by sound, line by line — with a 5-7-5 check for haiku.
- Document Word Counter Word and character counts for a whole batch of documents — with a quote.
Check & compare 8
- Text Diff See what changed between two versions — by line, word or character.
- Readability Checker Seven readability formulas with their workings, plus the hardest sentences to fix.
- Spell Checker Hunspell dictionaries in your browser: suggestions, replace all, your own word list.
- Passive Voice & Writing Style Checker Find passive voice, wordiness and other habits that make writing hard to read.
- Unicode Character Inspector Paste text to see each character — and the invisible or look-alike ones hiding in it.
- Inclusive Language Checker Spot words that may exclude or hurt readers — with alternatives and the reason why.
- Sentiment Analyzer Is it positive, negative or neutral? Every sentence scored, with the words behind it.
- Text Similarity Checker How much do two texts share? Four measures and every copied passage, side by side.
Clean & format 10
- Case Converter Thirteen case styles side by side, from Title Case to snake_case.
- Slug Generator Readable, SEO-friendly URL slugs from any title, one at a time or in bulk.
- Text Cleaner A checklist of clean-ups for pasted text — see what each one changed.
- Whitespace Remover Trim lines, collapse extra spaces, convert tabs and fix line endings.
- Find and Replace Text Many find-and-replace rules at once, with regex, case options and highlighted changes.
- Trim Lines Cut, shorten or split every line of a list in one step, with a before-and-after view.
- Text Redactor (Mask Personal Data) Hide personal data behind placeholders like [EMAIL_1], then put it back in the reply.
- Word Wrap & Text Align Wrap text at 72, 80 or any column and keep every prefix in place.
- Remove Accents (Diacritics) Turn é, ñ, ø and ß into plain letters, with a list of every change.
- Remove Punctuation & Characters Strip punctuation, numbers, emoji or any characters you choose, in one step.
Lines & lists 8
- Duplicate Line Remover Delete repeated lines in one paste — order kept, counts shown.
- Text Sorter Sort lines alphabetically, naturally, by number or length — or shuffle them.
- Comma Separated List Converter Column to comma list and back — or SQL IN, JSON, Python and CSV — in one paste.
- Text Splitter Cut long text into numbered parts that never break a word or a sentence.
- Add Prefix, Suffix & Line Numbers Wrap, number, bullet and indent every line of a list in one go.
- Filter Lines (Keep or Remove Lines Containing) grep in your browser: keep or drop lines by words, regex or length.
- Compare Two Lists What is in one list but not the other — and what they share.
- List Combiner & Keyword Mixer Zip, mix, interleave or pair up to six lists — with the result count shown first.
Extract & convert 10
- Email Extractor Paste text or HTML and get every address — deduplicated, grouped and ready to export.
- URL Extractor Every link in a page’s source or any text — cleaned up, counted and filterable.
- Number Extractor Paste any text and get every number in it, with an exact sum, average, low and high.
- Word to HTML Converter Paste from Word or Google Docs, or open a .docx — get clean, semantic HTML or Markdown.
- Audio to Text Transcriber Pro tool Turn recordings into text and subtitles with Whisper, privately on your own device.
- HTML to Markdown Converter Paste HTML or formatted text and get clean, GitHub-ready Markdown.
- String Escape / Unescape Escape text for 11 languages and formats, or turn escapes back into text.
- Text Encoding Converter & Mojibake Fixer Read old text files correctly, save them as UTF-8, and un-garble “café”.
- Text Summarizer (Extractive) Pick the key sentences of any article — your own words, never rewritten.
- Document to Text Converter Word, PowerPoint, OpenDocument, RTF, web pages and e-books to clean text or Markdown.
Type & write 4
- Markdown Editor Write Markdown and see it formatted as you type — kept in your browser, never uploaded.
- Speech to Text (Voice Typing) Type with your voice — in English, Hindi and other Indian languages.
- Typing Speed Test Find your WPM in English or Hindi — with live accuracy and the keys you miss most.
- Online Notepad Write notes that save themselves in this browser — no account, nothing uploaded.
Languages & scripts 5
- Hindi & Indian Language Typing Spell words in English letters (namaste → नमस्ते) or type on InScript — 11 languages.
- Kruti Dev to Unicode Converter Old Kruti Dev text to real Unicode Hindi — and Unicode back to Kruti Dev when you need it.
- Indic Script Converter Rewrite Indian-language text in another Indian script or in Latin letters.
- Romanize Text (Transliterate to Latin) Write Cyrillic, Greek, kana and Hangul in Latin letters the official way.
- Multilingual Virtual Keyboard Type languages your device has no keyboard for — on screen, or with your own keys.
Words & fun text 10
- Special Characters & Symbols Every common symbol, searchable by name — with its Alt code, HTML entity and escapes.
- Reverse Text, Mirror & Upside Down Backwards, word by word, upside down or mirrored — copy any version.
- Word Unscrambler & Anagram Solver Every word in your letters, blank tiles included — plus one- and multi-word anagrams.
- Fancy Text Generator Bold, cursive, bubble, glitch and 28 more styles — copy with one click.
- Emoji Picker (Copy & Paste) Find any emoji fast — with skin tones, versions, code points and shortcodes.
- Word Finder (Crossword & 5-Letter Helper) Crossword patterns, letter filters and a five-letter game helper — common words first.
- Rhyme Finder Rhymes by sound, not spelling — plus the rhyme scheme of your lyrics.
- Thesaurus (Synonyms & Antonyms) Synonyms and opposites grouped by meaning, with definitions and examples.
- Random Word Generator Random nouns, verbs and adjectives for games, prompts and practice — truly random.
- Classic Cipher Toolkit Nine historic ciphers for puzzles and teaching, with the tools to break them.
Generate text 6
- Lorem Ipsum Generator Placeholder text in paragraphs, sentences, words or lists, as plain text or HTML.
- Random Name Generator Real names from 49 cultures, US and UK names by birth year, and fantasy names for stories.
- Citation Generator Seven citation styles from one form — autofill from a DOI or ISBN and build your list.
- Text to Handwriting Typed text written out by hand on notebook paper, ready to save as PDF or PNG.
- Text Repeater Repeat any text as many times as you need, numbered or not.
- Mail Merge Text Generator Business tool One template, one row of data per person — every message written for you.
Compress & resize 3
- Image Compressor Make photos and graphics smaller — or fit them under a KB limit — without uploading.
- Image Resizer Exact pixel or print sizes, social presets, crop or pad to fit — in your browser.
- Bulk Image Resizer for Marketplaces Pro tool One preset for a whole folder of photos: sized, padded, renamed and zipped on your device.
Convert formats 19
- Image Converter Turn almost any image into JPG, PNG or WebP — in batches, privately, for free.
- JPG to PNG Converter Turn JPG photos into lossless PNG files — in batches, right in your browser.
- PNG to JPG Converter Smaller JPG files from PNG, with your choice of colour behind transparent areas.
- WebP Converter WebP to JPG or PNG and back again — including in Safari, without uploading.
- Image to SVG Converter (Vectorizer) Turn a logo, icon or signature into scalable SVG paths — traced on your device.
- WebP to JPG Converter Turn WebP images — even animated ones — into JPG files that every app can open.
- WebP to PNG Converter Lossless PNG from any WebP — transparency, colour profile and every frame kept.
- JPG to WebP Converter Smaller web images: JPG photos to WebP with live sizes, size targets and resizing.
- Image to Text (OCR) Pro tool Turn a photo, screenshot or scan into text you can copy — on your device, in 13 languages.
- PNG to WebP Converter Lighter website assets: PNG to WebP, lossless or lossy, with transparency kept.
- HEIC to JPG Converter iPhone HEIC photos to JPG in any browser — date kept, location removed, nothing uploaded.
- SVG to PNG Converter Sharp PNG, JPG or WebP from SVG at any size — single images or whole icon sets.
- Image to Base64 Converter Inline images as data URIs — optimised first, with snippets ready to paste.
- Logo Vectorizer Pro (PNG/JPG to SVG, PDF, EPS, DXF) Pro tool Print-ready vector logos in exact brand colours — traced on your device.
- BMP Converter BMPs at exactly the bit depth your display, machine or old program needs — and back again.
- Base64 to Image Decoder & Extractor Paste Base64, a data URI or a whole page source — get every image out of it.
- DDS & TGA to PNG Converter Open game textures — BC1 to BC7, mipmaps, cube maps and TGA — and save them as PNG.
- HDR & EXR to JPG Converter Open HDRIs and EXR renders, set exposure and tone mapping, and save a JPG or PNG.
- Image to C Array (Arduino Displays) Images as C arrays for OLED, e-paper and TFT screens, with a byte-exact preview.
Edit & enhance 17
- Image Cropper Drag or type exact pixels, lock a ratio, rotate, flip — then save.
- Watermark Photos (Text or Logo) Stamp your name, logo or the date on one photo or a whole batch — on your device.
- Add Text to Image Write on your photo in beautiful fonts — any size, colour or curve — then save it.
- Blur, Pixelate & Redact Image Hide faces, plates, names and numbers — blur, pixelate or a solid box, on your device.
- Photo Editor Pro tool Crop, fix, decorate and save one photo at full size — all in your browser.
- Merge Images Join images side by side, stacked or in a grid, or stitch screenshots into one long image.
- Photo Effects Cartoon, oil paint, watercolour, comic, posterize, emboss and glitch — at full resolution.
- Photo Filters & Adjustments One-click looks, .cube LUTs and precise adjustments — at full resolution, in your browser.
- Black and White Image Converter Greyscale with real formulas and film filters — or 1-bit dithering for printers.
- Image Splitter (Grid & Carousel) Cut one image into a grid, tiles, strips, Instagram grid posts or carousel slides.
- Sharpen Image Make slightly soft photos and scans crisper — and check the result at 100%.
- Annotate Image & Screenshot Paste a screenshot, add arrows, steps, highlights and blur — then copy it back.
- Photo to Sketch Converter Pencil, ink, charcoal, colouring page or cartoon — from your own photo, on your device.
- Rotate & Flip Image (Any Angle) Turn, straighten and mirror photos — one or a hundred, losslessly for JPG.
- Square Photo Maker (No Crop) Post the whole photo — no cropping — on a blurred, coloured or transparent background.
- Photo Album Scanner (Split, Straighten and Restore Prints) Pro tool Every print on an album page found, straightened and saved as its own photo.
- Add Border, Rounded Corners & Shadow Borders, rounded corners, shadows and Polaroid-style frames for one photo or a hundred.
Background & AI 8
- Bulk Background Remover (Batch, Full Resolution) Pro tool A whole catalogue of cut-outs in one go — the photos never leave your device.
- Background Remover Pro tool Cut out people, products and pets in seconds — the photo never leaves your device.
- AI Image Upscaler Pro tool Make small images bigger and sharper with on-device AI — or classic Lanczos for any size.
- Object Remover (Magic Eraser) Pro tool Paint over what should not be there — an on-device AI fills it in.
- Blur Background (Portrait Mode) Pro tool Portrait-mode blur for any photo — AI finds the subject, on your device.
- Text Behind Image Pro tool The poster look: your title behind the person or object, in front of the background.
- Make Background Transparent Click a solid background to remove it — instant, exact, no AI model needed.
- Blur Faces in Photos Pro tool Automatic face blurring for event photos and street shots — on your device, in batches.
Photos for forms & print 5
- Photo & Signature Resizer for Exam Forms For India Exam-form photos and signatures at the right pixels and KB — in one step, on your device.
- Passport & Visa Photo Maker Face-guided passport and visa photos, sized to the official rules — made on your device.
- Signature Maker Draw it or type it, and get a clean transparent signature file for any document.
- Passport & Exam Photo Studio (Batch for Studios and Cyber Cafés) Business tool Passport, visa and exam photos for every customer, made on the shop’s own computer.
- Transparent Signature Maker Photo of your signature in, clean transparent PNG out — shadows and paper removed.
GIFs & animation 5
- GIF Maker (Images to GIF) Drop in images, set the timing, get an animated GIF, APNG or WebP — made on your device.
- GIF Splitter (Frame Extractor) Every frame of a GIF, APNG or animated WebP as a PNG or JPG — or one sprite sheet.
- GIF Compressor Make animated GIFs lighter — or fit them under an emoji or sticker size limit.
- GIF Resizer & Cropper Resize, crop and rotate animated GIFs without losing a single frame.
- GIF Speed Changer & Reverser Change a GIF’s speed without re-encoding it — or reverse it, boomerang it and cut frames.
Create graphics 9
- QR Code Generator Static QR codes for links, Wi-Fi, contacts and UPI — PNG or SVG.
- Favicon Generator favicon.ico, app icons, manifest and HTML tags from a logo or a letter.
- Photo Collage Maker Pro tool Arrange 2–20 photos into a collage or contact sheet, sized for social posts or prints.
- Bulk QR Code Generator (CSV to ZIP or Print Sheets) Pro tool A spreadsheet in, a ZIP or printable label sheets out — every code checked to scan.
- Meme Generator Classic and modern memes from your own pictures and GIFs — made on your device.
- Barcode Generator Print-ready barcodes with checked digits and exact sizes — one or a thousand.
- Cross-Stitch Pattern Maker Photo in, printable DMC chart out — with finished size, symbols and a thread list.
- DP Frame & Campaign Photo Frame Maker Your photo in a campaign or event frame — drag, zoom, rotate and save.
- Image to STL (Lithophane Maker) Photos into lithophanes, logos into reliefs and cookie cutters — STL for your 3D printer.
Inspect & colours 5
- Image Metadata Viewer Read Exif, GPS, IPTC and XMP — and strip them before you share.
- QR Code & Barcode Scanner See what a QR code or barcode says — and where it leads — before you act on it.
- Image Viewer (Preview Any Format) Open nearly any image, zoom to the pixel and see what the file really is.
- EXIF Editor Fix dates, time zones, credits and GPS in JPEGs without touching the picture.
- Duplicate Photo Finder Find identical and look-alike copies of your photos, and keep the best one.
Organize pages 5
- Merge PDF Combine PDFs in any order, with page ranges, bookmarks and links kept.
- Split PDF Break a PDF into single pages, page ranges or equal parts — preview first.
- PDF Page Extractor Extract, delete, reorder or rotate pages — click thumbnails or type ranges.
- Split PDF Pages in Half Turn two-page scans and 2-up sheets back into single pages — without losing quality.
- Interleave PDF Pages (Collate Scans) Put single-sided scans of a double-sided document back in order.
Compress & optimize 5
- PDF Compressor Shrink PDFs by recompressing their images — real sizes, nothing uploaded.
- Compress PDF to Exact Size (100 KB, 200 KB, 1 MB) Choose a limit and get the sharpest PDF that fits under it — made on your device.
- PDF to Grayscale / Black & White Make a colour PDF gray for cheaper printing, black and white, or a night-reading negative.
- Repair PDF Rescue a PDF that won’t open — and see exactly what was wrong with it.
- Flatten PDF Make form fields, comments and layers part of the page — or turn pages into images.
Convert from PDF 9
- PDF to Image Converter Turn PDF pages into sharp PNG or JPG images, right in your browser.
- PDF to Word Converter Pro tool Turn a PDF into a Word document you can edit — headings, lists and tables included.
- PDF to Excel Converter Pro tool Turn tables in a PDF into a spreadsheet — columns you can fix, numbers that add up.
- PDF to Text Extractor Pull clean, copyable text out of a PDF — in reading order or with its layout kept.
- OCR PDF (Make Scanned PDFs Searchable) Pro tool Recognise the text in scans and photos — and get a searchable PDF, plain text or hOCR.
- Extract Images from PDF Get every picture out of a PDF at its original quality — nothing is uploaded.
- PDF to Markdown Converter Pro tool Turn a PDF into Markdown or HTML — headings, lists, tables, code and pictures included.
- Bank Statement PDF to Excel / CSV Pro tool Turn a statement PDF into a clean, checked transaction table for Excel.
- PDF to PowerPoint (PPTX) Pro tool Every page becomes a slide — a sharp picture of the page, with its text in the notes.
Convert to PDF 8
- Image to PDF Converter (JPG, PNG, HEIC to PDF) Put photos, scans and screenshots into one tidy PDF — in any order, on any paper size.
- Word to PDF Converter Pro tool Preview a .docx page by page and save it as a PDF with real, selectable text.
- Markdown to PDF Converter Markdown in, a clean, print-ready PDF out — tables, code, footnotes and all.
- HTML to PDF Converter Pro tool HTML code, a saved web page or a ZIP of one — to a PDF, safely and privately.
- Text to PDF Converter Plain text, logs and code to a clean PDF — with headers, page and line numbers.
- Excel to PDF Converter (XLSX, CSV) Pro tool Spreadsheets to print-ready PDFs — formatting, page setup and header rows kept.
- Email to PDF (EML, MSG) Pro tool A saved e-mail as a PDF — header, message, pictures and attachments in one file.
- SVG to PDF (Vector) SVG drawings as sharp vector PDF pages — paths, gradients and text kept as vectors.
Edit & annotate 6
- Add Watermark to PDF Stamp text or a logo on chosen pages, over or under the content, as real PDF content.
- Add Page Numbers to PDF (Headers & Footers) Page numbers and header or footer text in six positions, with a live preview.
- PDF Editor (Add Text, Images & Shapes) Pro tool Add text, images, shapes, drawings, white-out and links to any page of a PDF.
- Annotate PDF (Highlight, Comment, Draw) Pro tool Highlight and mark text, add notes, text boxes and drawings, or edit existing comments.
- Crop PDF Cut the margins off PDF pages by dragging a box, typing margins or auto-cropping.
- Bates Numbering for PDFs Pro tool Number every page of a document production — privately, in your browser.
Forms & mail merge 3
- Fill PDF Form Pro tool Type into a PDF’s form fields, or anywhere on the page, and save the filled copy.
- PDF Mail Merge (Bulk Certificates & Letters) Business tool Your PDF design plus a spreadsheet: one certificate, letter or badge per person.
- Create Fillable PDF Form Pro tool Draw fields on any PDF — or accept the blanks it finds — and save a fillable form.
Sign & protect 5
- Sign PDF (Electronic Signature) Pro tool Draw, type or upload your signature, place it on any page and save the signed PDF.
- Password Protect PDF Pro tool Lock a PDF with a password and choose what others may print, copy or change.
- Unlock PDF (Remove a Password You Know) Pro tool Type the password once and save a copy of the PDF that opens without it.
- Redact PDF (Permanently Remove Sensitive Information) Pro tool Black out text and areas for good — and strip the hidden data that gives secrets away.
- Digitally Sign PDF with a Certificate Pro tool A certificate-based signature that PDF readers can verify — made on your device.
View & check 6
- PDF Metadata Viewer & Editor Inspect everything a PDF says about itself — then edit or wipe it.
- PDF Reader A private PDF viewer: search, bookmarks, read aloud and night mode — nothing is uploaded.
- PDF Word Counter Word, character and sentence counts for PDFs — per page, per file and in total.
- Compare PDF Files (Text & Visual) Pro tool See every changed word side by side — and every area of the page that looks different.
- PDF Accessibility Checker (PDF/UA) See what makes a PDF hard to use with a screen reader — and fix the easy parts.
- PDF Object Inspector (Developer Tool) Every object, stream and revision of a PDF — the way a PDF developer sees it.
Print & paper 5
- Resize PDF Pages (Change Page Size) Put every page on A4, Letter or any size — text stays sharp and selectable.
- Multiple Pages per Sheet (N-up) Print several pages on one sheet — handouts, slides and drafts on less paper.
- PDF Booklet Maker Print double-sided, fold in half, staple — and the pages read in order.
- PDF Page Counter & Print Cost Estimator Pages, sizes and colour pages for a stack of PDFs — and what printing them will cost.
- Print Large PDF on Multiple Pages (Poster / Tiles) Print big pages at home, at real size, on sheets you tape together.
Convert & compress video 7
- Video Converter Pro tool Change a video’s format or codec on your device — instant when nothing needs re-encoding.
- Video Compressor Pro tool Make a video small enough to send: pick a size in MB or a quality, then compare.
- MOV to MP4 Converter Pro tool Turn .MOV videos from iPhones and Macs into MP4 — usually in seconds, with no loss.
- MKV to MP4 Converter Pro tool Turn MKV into MP4 that TVs and phones play — with your choice of audio and subtitles.
- Video to GIF Converter Pro tool Make a GIF from any part of a video — see the size before you make it.
- WebM to MP4 Converter Pro tool Turn WebM into MP4 that plays everywhere — and fix recordings that cannot be seeked.
- GIF to MP4 Converter Pro tool Turn a GIF into a much smaller MP4 that plays everywhere — frame timing kept.
Edit video 8
- Merge Videos (Video Joiner) Pro tool Put several clips together into one video — losslessly when they match.
- Video Cropper Pro tool Cut a video down to the part of the picture you want — vertical, square or any size.
- Rotate & Flip Video Pro tool Fix a sideways or upside-down video in seconds, or mirror a selfie clip.
- Mute Video (Remove Audio) Pro tool Take the sound out of a video in seconds, with the picture copied untouched.
- Video Invitation Maker (Indian Weddings & Events) For India Pro tool Animated e-invites with your names, photos, music and a map QR code.
- Video Trimmer & Cutter Pro tool Cut a video down to the part you want — instantly and losslessly, or to the exact frame.
- Screen Recording Editor (Zoom, Backgrounds, Webcam, Captions) Pro tool Turn a raw screen recording into a polished demo — zooms, backgrounds, blur and captions.
- WhatsApp Status Maker (Split Videos, Fit Photos) Pro tool Long videos cut into Status-length parts, photos fitted to the phone screen.
Convert audio 5
- MP4 to MP3 Converter Pro tool Turn the sound of any video into an MP3, with tags and cover art, on your own device.
- Extract Audio from Video Pro tool Save a video’s sound exactly as it is — or as MP3 or WAV — without uploading anything.
- WAV to MP3 Converter Pro tool Shrink WAV recordings to MP3 with the quality, channels and tags you choose.
- M4A to MP3 Converter Pro tool Change M4A and AAC audio to MP3, with its tags and cover art carried over.
- Audio Converter Pro tool Change any audio file’s format, quality and channels on your own device.
Edit audio 4
- Volume Booster (Audio & Video) Pro tool Turn quiet recordings up — or loud ones down — without clipping.
- MP3 Cutter & Audio Trimmer Pro tool Cut any audio file on its waveform — frame-accurate and lossless for MP3 and AAC.
- Audio Joiner (Merge MP3) Pro tool Put several audio files together into one, in the order you choose.
- Audio Editor (Multi-Track: Cut, Fade, Mix Voice with Music) Pro tool Cut, fade and mix several recordings on a timeline — on your device, no upload.
Record & test 5
- Screen Recorder Record tutorials, demos and bug reports straight from your browser, no install.
- Voice Recorder Record voice notes, interviews and lectures, safely saved in your browser as you go.
- Webcam Test Check that your camera works and see the resolution and frame rate it really sends.
- Microphone Test See and hear whether your microphone works, how loud it is and how the browser changes it.
- Speaker & Headphone Test Find out whether every speaker plays from the right place, in phase and in balance.
Music tools 3
- Tone Generator (Frequency Generator) Play any test tone, sweep, musical note or phone keypad tone — and save it as a WAV.
- Online Metronome Steady clicks for practice, with accents, subdivisions and a tempo trainer.
- Online Guitar Tuner (Chromatic) Play a string and see the note, how far off it is and which way to turn the peg.
Color 10
- Color Palette Generator Press Space for a new palette, lock the colors you like and export them anywhere.
- Tailwind Color Palette Generator (50–950) One brand color in, an 11-step Tailwind shade scale out — with contrast for every shade.
- Color Wheel & Harmony Finder Move a base color around the wheel and get matching colors for any harmony rule.
- UI Color Theme Generator (shadcn, Tailwind, Material 3) Brand color in, full light and dark theme out — every text pair checked for contrast.
- Color Palette from Image Get the main colors of any photo or logo, with how much of the image each one covers.
- Image Color Picker Click any pixel of a photo, logo or screenshot to get its exact color code.
- Color Contrast Checker (WCAG 2.2) Test text and background colors against WCAG 2.2, then fix them in one click.
- Color Blindness Simulator Preview images and palettes as people with color vision deficiencies may see them.
- Color Difference (Delta E) Calculator Measure how different two colors are with every common Delta E formula.
- Color Temperature (Kelvin) to RGB Converter See what color a light of any temperature is, and how warm or cool a color is.
CSS generators 16
- CSS Gradient Generator Drag color stops, blend in OKLCH or sRGB, and copy the CSS — or save it as a wallpaper.
- CSS Box Shadow Generator Stack shadow layers visually and copy clean CSS, a Tailwind class or a whole shadow scale.
- CSS Grid Generator Paint named areas, size the tracks and get responsive CSS grid code, HTML or Tailwind.
- PX to REM Converter px ⇄ rem, em and every CSS length unit — or convert a whole stylesheet at once.
- Glassmorphism CSS Generator Frosted glass over any background, with a text-contrast check that sees through the blur.
- Mesh & Grainy Gradient Generator Drag color points into soft mesh or aurora gradients, add grain, export CSS or 4K images.
- Background Pattern Generator (CSS & SVG) Fifteen seamless patterns with your colors, size and angle — as CSS, SVG or PNG.
- Neumorphism (Soft UI) Generator Paired light and dark shadows from one base color, with an honest contrast check.
- CSS Clip-Path Generator Draw a clip-path by dragging points, round its corners and wrap text around it.
- CSS Flexbox Generator & Playground Try every flexbox property on live boxes, understand the result and copy the code.
- CSS Text Shadow Generator Stack text-shadow layers on your own words and font, check contrast, copy CSS or Tailwind.
- Cubic Bezier & CSS Easing Generator Shape an easing curve, watch it race the classics and copy CSS, Tailwind or JavaScript.
- CSS Animation & Keyframes Generator Design keyframe animations visually and copy accessible CSS or a Tailwind theme snippet.
- CSS Border Radius Generator Round each corner, or drag eight radii into organic shapes — then copy CSS or Tailwind.
- CSS Loader & Spinner Generator Lightweight loading spinners in one element, accessible and motion-friendly.
- Custom Scrollbar CSS Generator Custom scrollbars that work in every browser, previewed in a scrolling box.
SVG & shapes 6
- PNG to SVG Converter (Image Vectorizer) Trace logos and flat art into clean SVG paths — one colour for cutting, or up to 64.
- SVG Optimizer Shrink SVG icons and illustrations with SVGO — previewed safely, nothing uploaded.
- SVG Wave & Section Divider Generator Make layered waves, curves, tilts and arrows to divide page sections — copy SVG or CSS.
- SVG Blob Generator Generate smooth organic blobs from a seed, fill them, and animate one blob into another.
- SVG Shape Generator (Polygon, Star, Badge) Parametric vector shapes with real rounded corners — as SVG, clip-path or PNG.
- Squircle & Smooth Corner Generator Smooth, continuous corners for icons, cards and buttons — as SVG or CSS.
Layout, print & screens 4
- Aspect Ratio Calculator Simplify any width × height to its ratio, or keep a ratio and solve the missing side.
- Paper Size Converter (A4 in Pixels, mm, Inches) Over 100 paper, card and poster sizes in mm, inches, points and pixels at any DPI.
- Book Cover & Spine Width Calculator Spine width, full cover size and a print template for your paperback.
- Printable Grid & Graph Paper Generator Vector graph, dot, isometric, lined and design paper — print at 100% for true scale.
Create graphics 16
- Festival & Business Greeting Poster Maker (India) For India Pro tool Diwali, Eid, Pongal and more Indian festivals — with your logo and UPI QR on each post.
- Invitation Card Maker (Weddings, Birthdays, Griha Pravesh) Pro tool Wedding, birthday and house-warming invitations — for WhatsApp and for print.
- Logo Maker Pro tool Make a clean logo from free fonts and icons — SVG and transparent PNG, light and dark.
- Graphic Design Editor (Posters, Social Posts, Thumbnails) Pro tool Make posters, social posts and thumbnails in your browser — autosaved, never uploaded.
- Business Card Maker (Print-Ready PDF) Pro tool Two-sided cards with a logo and QR code — print-ready PDF or a sheet to print at home.
- Screenshot Beautifier & Browser Mockup Turn a plain screenshot into a polished image for posts, docs and launches — no watermark.
- App Icon Generator (iOS, Android, macOS) Every app icon size for Xcode, Android Studio and Google Play from one image.
- Device Mockup Generator Pro tool Show your app or website on phones, tablets, laptops and watches, in your browser.
- T-Shirt & Merch Mockup Generator Pro tool See your design on t-shirts, hoodies, mugs, bags, caps and phone cases before you print.
- Placeholder Image Generator Dummy images in any size, colour and format, made in your browser.
- Flyer & Poster Maker (shop offers, admissions, hiring, events) Pro tool Business flyers and posters with your logo and QR code — print-ready, no watermark.
- Open Graph & Social Share Image Generator Link-preview images with auto-fitting text and crop checks for each platform.
- Photo to Pixel Art Converter Pixelate a photo into real pixel art with retro palettes and dithering — in your browser.
- Pixel Art Maker A free pixel art editor with layers, frames and onion skin — saved in your browser.
- Property Listing Flyer & Brochure Maker For India Pro tool Listing flyers, brochures and WhatsApp posts with RERA numbers and carpet area.
- Letterhead Maker (PDF and Word Header/Footer) Your company letterhead as a vector PDF and a Word template with a real header and footer.
Meta tags & snippets 7
- Meta Tag Generator Head tags with length checks and a live Google-style result preview.
- Open Graph Generator Social sharing tags with an image check and approximate link previews.
- Schema Markup Generator Fill in a form, get valid JSON-LD with Google’s required and recommended fields marked.
- Canonical Tag Generator Clean up URLs and get rel="canonical" tags — for one URL or thousands.
- Open Graph & Social Preview Checker See how your link looks when shared, and fix the tags that break it.
- SERP Snippet Preview Your title and snippet as a search result — cut where results would cut them.
- Schema Markup Validator Find syntax errors, schema.org mistakes and missing Google properties in your markup.
Sitemaps, robots & redirects 5
- Robots.txt Generator & Tester Create, check and test robots.txt rules exactly the way Googlebot reads them.
- XML Sitemap Generator Paste URLs, get a valid sitemap.xml — split automatically above 50,000 URLs.
- XML Sitemap Validator Check an XML sitemap against the protocol and Google’s rules.
- 301 Redirect Generator (.htaccess, Nginx, IIS) Turn old-to-new URL lists into server redirect rules, with chain and loop checks.
- Redirect Checker Follow a URL hop by hop and see what every redirect does.
Page & site checks 6
- Indexability Checker Can Google index this URL? One check, the exact reason.
- On-Page SEO Checker A one-page SEO audit with every issue explained and a score whose weighting is shown.
- Title & Meta Description Length Checker Paste a crawl or a sheet; see which titles and descriptions will be cut.
- Page Speed Test (Lighthouse via PageSpeed Insights) Lighthouse scores, Core Web Vitals and what to fix first — from Google PageSpeed Insights.
- HTTP Header Checker See what a server sends back, and what each header means for search.
- Broken Link Checker Check every link on a page and see which are broken, blocked or redirected.
Marketing & ads 5
- CPM Calculator Ad cost per 1,000 impressions — or the cost, or the impressions a budget buys.
- A/B Test Significance Calculator Is the difference real? p-value, uplift and its interval — conversions or averages.
- A/B Test Sample Size Calculator Visitors per variant and days to run — worked out before the test starts.
- UTM Builder (Campaign URL Builder) Tagged campaign links for GA4 — consistent names, the right channel, a QR code.
- ROAS Calculator Return on ad spend, break-even ROAS and the target you need for a profit.
Loans & EMI 8
- EMI Calculator Monthly instalment, total interest and a full repayment schedule.
- Loan Calculator Find the EMI, loan amount, tenure or rate — and see what prepaying saves.
- Credit Card Interest & Payoff Calculator Why the minimum due takes years — and what paying more saves.
- Debt Payoff Planner (Snowball vs Avalanche) Your debt-free date, the order to pay, and what each method saves.
- Mortgage Calculator (PITI) For US Your full monthly house payment, when PMI ends, and what extra payments save.
- Home Loan Eligibility Calculator For India How much you can borrow, and the property price it can buy under RBI’s rules.
- Debt-to-Income & Credit Utilization Are you loan-ready? DTI, credit utilization and debt service coverage in one place.
- Car Lease Calculator Your lease payment line by line, what is due at signing, and whether buying costs less.
Savings & interest 12
- Compound Interest Calculator Grow a lump sum and regular deposits at any compounding frequency.
- Simple Interest Calculator Interest and total amount — or the missing principal, rate or time — with the formula.
- FD Calculator (Fixed Deposit) For India Maturity, interest, payouts and TDS for bank FDs and Post Office Time Deposits.
- RD Calculator (Recurring Deposit) For India Maturity, interest and TDS for monthly bank and Post Office recurring deposits.
- PPF Calculator For India Year-by-year PPF growth, maturity, extensions, loans and withdrawals.
- Sukanya Samriddhi Yojana (SSY) Calculator For India Year-wise SSY balance, maturity at 21 years and the education withdrawal at 18.
- NSC Calculator For India Maturity value and year-wise accrued interest for a 5-year NSC (VIII Issue).
- Kisan Vikas Patra (KVP) Calculator For India When your Kisan Vikas Patra doubles, and its value if encashed early.
- SCSS Calculator (Senior Citizens’ Savings Scheme) For India Quarterly SCSS interest, payout dates, extensions, early closure and TDS.
- Post Office Monthly Income Scheme (MIS) Calculator For India Your monthly interest from Post Office MIS, every payout date and early-closure value.
- Post Office & Small Savings Schemes Comparison For India Every post office scheme’s current rate, after-tax yield, lock-in and tax benefit.
- Savings Goal Calculator What each goal will cost, what to save for it, and one combined monthly plan.
Investing & markets 13
- SIP Calculator For India Project a SIP or lump sum, plan a goal and see the maths behind every number.
- CAGR Calculator Yearly growth rate between two values, plus future value, return needed and time to goal.
- XIRR Calculator The yearly return on money that went in and came out on different dates.
- Stock Average Calculator Your real average price — and what it takes to average down or up.
- Stock Profit & Break-even Calculator What a trade really made after costs, and the price where it breaks even.
- Brokerage & Charges Calculator (NSE/BSE) For India The full cost of a trade, line by line, and the price where it breaks even.
- NPV & IRR Calculator Every capital-budgeting measure of a project at once — and of two, side by side.
- Present & Future Value Calculator (TVM Solver) A financial calculator’s TVM keys in your browser: give any four values, get the fifth.
- Position Size & Risk-Reward Calculator Size every trade so a stop-loss costs exactly the risk you chose — and see the reward.
- Dividend Yield & DRIP Calculator What a share’s dividend pays you now, and what reinvesting it could grow to.
- P/E Ratio & Valuation Multiples Calculator How the market prices a share against its earnings, assets and sales.
- Intrinsic Value Calculator (DCF, DDM, Graham) What a share may be worth three ways — and how far the price is from it.
- WACC, CAPM & Valuation Discount rates, DCF value, round dilution and bond yields — with the working shown.
Retirement & insurance 7
- Retirement Corpus Calculator The corpus you need, what you are on course for, and the SIP that closes the gap.
- EPF Calculator For India Your PF corpus at retirement, with the new ₹25,000 wage ceiling and the EPS split.
- FIRE Calculator (Financial Independence) Your financial-independence number and how fast your savings rate gets you there.
- NPS Calculator (National Pension System) For India Corpus, lump sum and pension under the new PFRDA exit rules (80/20 and 60/40).
- SWP Calculator (Systematic Withdrawal Plan) How long your corpus lasts with a fixed or rising monthly withdrawal.
- EPS Pension Calculator (EPS-95) For India Your EPS-95 monthly pension from service and pay, the way EPFO works it out.
- Life Insurance (Term Cover) Calculator How much term cover your family needs, two ways, and the gap against what you have.
Income tax & GST 10
- GST Calculator For India Add or remove GST, see CGST + SGST or IGST, and total a whole invoice.
- Income Tax Calculator (Old vs New Regime) For India Full old-vs-new regime tax computation for Tax Year 2026-27 and FY 2025-26.
- HRA Exemption Calculator For India Exempt and taxable HRA, month by month, with the eight 50% cities of rule 279.
- VAT Calculator (Add or Remove VAT) Net, VAT and gross at any rate — UK, EU, Gulf and more — plus multi-rate invoices.
- Capital Gains Tax Calculator (India) For India Short- or long-term, the gain, and the tax a sale really adds to your year.
- Cost Inflation Index (CII) Calculator For India The official CII table, your indexed cost, and whether indexation still applies.
- TDS Calculator (Income-tax Act 2025) For India Does TDS apply, at what rate, and how much — under the new Act and the 1961 Act.
- Advance Tax Calculator For India How much advance tax to pay by each due date, and the interest if you pay late.
- Home Loan Tax Benefit Calculator For India Interest and principal by year, the deductions they give, and the tax saved per regime.
- Zakat Calculator Zakat at 2.5% against the nisab you choose, with gold and silver valued by purity.
Budgets & everyday money 13
- Percentage Calculator Eight percentage calculators, each showing the working for its answer.
- Discount Calculator Final price, savings and the real effect of stacked discounts — with GST if needed.
- Inflation Calculator Future cost, purchasing power and real returns at the inflation rate you choose.
- Gold & Silver Price Calculator The full jewellery bill — metal, wastage, making and 3% GST — from the rate you enter.
- Rent vs Buy Calculator Buy or rent? Your net worth both ways, year by year, and when buying pulls ahead.
- Amount in Words Converter (Rupees, Dollars & More) “Rupees One Lakh … Only” for one amount or a whole spreadsheet column.
- Budget Planner (50/30/20) Give every rupee a job — and see how your plan compares with 50/30/20.
- Historical Inflation Calculator (Any Country) What ₹100 of 1990 — or $100 of 1950 — is worth today, from official price indices.
- Net Worth Calculator Your personal balance sheet, with dated snapshots to see it grow.
- UPI QR Code Generator For India Your UPI ID as a scan-to-pay QR code — PNG, SVG or a print-ready standee.
- Tip Calculator & Bill Splitter The tip, the total and each person’s share — to the paisa, or rounded up.
- Historical Exchange Rates Past ECB exchange rates for any day since 1999, with averages, highs, lows and CSV.
- Rent Affordability Calculator The rent your income supports, the income a rent needs, and what a lease really costs.
Invoices & billing 14
- Invoice Generator Pro tool GST-ready invoices with a live preview, amount in words and PDF download.
- Quotation Generator Pro tool Price quotes with GST, validity date and terms — convert to an invoice in one click.
- Invoice Number Generator Design a numbering scheme, generate the series and check it fits GST rules.
- Receipt Generator Pro tool Numbered receipts for cash, UPI, card, cheque or bank transfer — or a GST advance voucher.
- Rent Receipt Generator A year of rent receipts in one go — monthly or quarterly, 1–3 per A4 page.
- Purchase Order Generator Business tool Professional POs with expected GST, saved vendors and one-click copy into an invoice.
- Proforma Invoice Generator Pro tool A clearly marked proforma with a payment schedule — then one click to a tax invoice.
- Commercial Invoice Generator Business tool Customs-ready invoices for exports and international courier shipments.
- Delivery Challan Generator For India Business tool Move goods without an invoice — with every rule 55 particular and the right copies.
- Credit Note & Debit Note Generator For India Pro tool Adjust an invoice the right way, with the GST worked out and the deadline checked.
- Packing Slip Generator Business tool Show customers exactly what is in the parcel — box by box, with a scannable order code.
- Shipping Label Generator Business tool Clear, scannable parcel labels for 4 × 6 thermal printers or plain A4 paper.
- Expense Report Generator Pro tool Turn receipts into a clean, approvable expense claim — totals and receipts in one PDF.
- Cheque Printing Tool For India Date, payee and amount printed straight onto your own cheque — lined up for your printer.
GST & compliance 4
- GSTIN Validator For India Is this GST number well-formed? Every one of its 15 characters, explained.
- HSN & SAC Code Finder For India The right HSN or SAC code for your invoice, from GSTN’s own list.
- GST Late Fee & Interest Calculator For India Late fee by return, turnover and days late, plus 18% interest — every figure sourced.
- GSTR-2B vs Purchase Register Reconciliation For India Business tool Find the invoices your suppliers have not reported — before you file GSTR-3B.
Pricing & profit 7
- Profit Calculator Gross, operating and net profit with margins — for the business or per unit.
- Margin Calculator Any two of cost, price, profit, margin or markup — the rest worked out.
- Break-Even Calculator How many units you must sell to cover your costs — with a chart.
- Markup Calculator Cost plus markup to price — and the whole chain from maker to MRP, both ways.
- Marketplace Fee & Profit Calculator Enter your marketplace’s fees — see the payout, the profit and the price you need.
- Freelance Rate Calculator From the income you want to the rate you should charge — hourly, daily, per project.
- Payment Gateway Fee Calculator See what a payment leaves you after fees — and what to charge to receive an exact amount.
HR & payroll 21
- Experience & Relieving Letter Generator Business tool Experience and relieving letters on your letterhead, with the tenure worked out for you.
- Timesheet Calculator Clock in and out for each day — hours, overtime and pay for the week.
- Resignation Letter Generator A resignation letter with your last working day worked out from the notice period.
- Gratuity Calculator For India Gratuity under India’s Labour Codes: eligibility, amount, tax and the 30-day deadline.
- Overtime Calculator For India & US Overtime hours and pay for a week — India, US federal, California or your own rules.
- Labour Code Salary Structure Calculator For India Is your pay structure within the 50% wage rule? See the wages the Codes count.
- Payslip Generator Business tool Salary slips with EPF/ESI, unpaid days and year-to-date totals — India, UK or anywhere.
- Hourly to Salary Calculator Turn an hourly rate into a salary, or a salary into an hourly rate, for any pay period.
- Offer & Appointment Letter Generator Business tool Letterhead, terms and a CTC annexure in minutes — download PDF or editable Word.
- PF & ESI Contribution Calculator For India Monthly PF and ESI for one employee or a whole payroll, with the ECR challan totals.
- Salary Certificate Generator Business tool A salary certificate for the bank, embassy or landlord, on your letterhead.
- Internship Certificate Generator Business tool Internship completion certificates and letters, with the duration worked out for you.
- Salary Hike Calculator New salary from a hike, or the hike from old and new pay — and what it is really worth.
- Pro-Rata Salary Calculator Pay for a part month on the basis your payroll uses, split by component.
- Statutory Bonus Calculator For India Statutory bonus under the Code on Wages: who qualifies, how much, and by when.
- Employee Cost Calculator What an employee really costs: salary, employer taxes, benefits and overheads.
- Leave Encashment Calculator For India Leave encashment, earned leave and the tax-free part on leaving — worked out.
- Attrition Rate Calculator Attrition, retention and first-year turnover from your headcount and exits.
- Notice Period Calculator Your last working day, the buyout amount and when the final wages are due.
- Full & Final Settlement Calculator For India Everything due when someone leaves, with each legal deadline — as a printable statement.
- Gulf End-of-Service Gratuity Calculator For Gulf The gratuity each Gulf labour law gives you — UAE, Saudi, Qatar, Oman, Bahrain, Kuwait.
Business finance 4
- NPV Calculator What a project’s future cash flows are worth today — and whether it pays.
- IRR Calculator The return a project earns on the money it ties up — and when that number misleads.
- Depreciation Calculator A year-by-year depreciation schedule for your books, Indian income tax or US MACRS.
- ROI Calculator What you put in, what came back — ROI, annualised ROI and a side-by-side comparison.
Branding & documents 3
- Resume Builder Write your resume or biodata, watch it take shape, and download a clean PDF or Word file.
- Business Name Generator Dozens of brand name ideas from your own keywords, with an optional domain check.
- Email Signature Generator A clean HTML signature for Gmail, Outlook and Apple Mail — copy, paste, done.
Agreements & contracts 9
- Rent Agreement Generator For India Pro tool Residential, commercial or leave and licence, with checks on registration and deposits.
- NDA Generator (Mutual & One-Way) Pro tool A clear confidentiality agreement with checks for Indian and US law.
- Freelance Contract Generator Pro tool Scope, milestones, kill fee and IP — with India’s MSMED and copyright rules built in.
- Partnership Deed Generator For India Pro tool New or supplementary deeds, with the Partnership Act defaults and tax limits explained.
- Employment Agreement Generator (India) For India Pro tool Appointment letters and employment contracts that follow India’s Labour Codes.
- MOU Generator Pro tool An MoU that says exactly which clauses bind the parties — and which do not.
- Vehicle Sale Agreement Generator For India Pro tool Sell a used car or bike on paper that shows exactly when it stopped being yours.
- Loan Agreement Generator For India Pro tool A loan agreement with a correct repayment schedule and the legal checks that matter.
- Promissory Note Generator For India Pro tool A valid pro note with its receipt — and a refusal of notes the law does not allow.
Affidavits, wills & declarations 6
- Affidavit Generator For India Pro tool Numbered “That …” paragraphs and a verification, ready for the notary.
- Power of Attorney Generator For India Pro tool Special, general or NRI power of attorney — and the revocation deed — done right.
- NOC Letter Generator For India The NOC or consent letter you were asked for — worded for its purpose.
- Board Resolution Generator For India Business tool Certified true copies of the board resolutions banks, GST and the ROC ask for.
- Will Generator (India) For India Pro tool A clear, signing-ready will — with the witness and probate rules explained.
- Indemnity Bond Generator For India Pro tool The indemnity bond companies, banks and societies ask for — filled in for your case.
Notices & complaints 10
- Legal Notice Generator For India Pro tool A clear legal notice — facts, demand, deadline — with the statutory rules checked.
- Cheque Bounce Notice Generator For India Pro tool The s.138 demand notice, with the deadlines checked before you post it.
- Consumer Complaint Generator For India A complete consumer complaint, the right Commission and fee — ready to file.
- RTI Application Generator For India A correct RTI application in minutes — with your reply and appeal deadlines.
- Ombudsman Complaint Generator For India The right forum, the waiting period, the deadline — and a complaint ready to file.
- Bank Fraud Complaint Letter For India Dispute unauthorised debits under RBI’s rules — and see what you can be made to pay.
- Data Request (DSAR) Letter Generator Ask any organisation what it holds about you — and make it act on time.
- DMCA Takedown Notice Generator A takedown notice hosts act on — and a counter-notice if your content was removed.
- RTI Appeal Generator For India No reply, a refusal or a late fee demand? Draft the right RTI appeal, on time.
- Police Complaint Generator For India A clear complaint the police can act on — with IMEI checks, CEIR and 1930 steps.
Policies & privacy compliance 4
- Terms and Conditions Generator Terms of use, sale or service — with the clauses Indian law will not enforce flagged.
- Privacy Policy Generator A privacy policy that matches what your site really does — and the laws that apply.
- Cookie Policy Generator Find out what your cookies do, list them properly and explain the choices visitors have.
- Cookie Consent Banner Generator A cookie banner you host yourself: fair choices, scripts that wait, no third-party CMP.
Deadlines & legal maths 4
- Limitation Period Calculator For India The last day to file, with every exclusion and fresh period explained step by step.
- Cheque Bounce Timeline Calculator For India Every cheque-bounce deadline from your dates — with the rule behind each one.
- MSME Delayed Payment Interest Calculator For India Due dates, compound interest at three times the Bank Rate, and a ready demand letter.
- Consumer Court Fee Calculator For India The right Consumer Commission and the exact filing fee, from what you paid.
Law reference & checklists 3
- IPC to BNS Converter For India IPC ↔ BNS section numbers, with punishment and classification side by side.
- CrPC to BNSS Converter For India CrPC ↔ BNSS section numbers, with what changed: e-FIR, zero FIR and new deadlines.
- Trademark Class Finder Search 10,000 Nice indications, build a multi-class specification and see the fee.
Body measurements 8
- BMI Calculator (WHO & Asian Cut-offs) Your BMI on WHO, Asian and Indian scales, with your healthy weight range.
- Ideal Body Weight Calculator Devine, Robinson, Miller and Hamwi side by side, with your healthy BMI weight range.
- Body Fat Calculator (Navy, Skinfold, BMI) Body-fat % four ways, with fat mass, lean mass and the healthy range for your age.
- Child & Teen BMI Percentile Calculator BMI-for-age percentile and weight status for ages 2–19, plotted on a CDC growth chart.
- FFMI Calculator (Fat-Free Mass Index) Fat-free mass index from your body-fat %, compared with adults of your age and sex.
- Waist-to-Hip Ratio Calculator Your waist-to-hip ratio and waist size against WHO and IDF cut-offs.
- Waist-to-Height Ratio & Body Roundness Index Is your waist less than half your height? Plus Body Roundness Index and ABSI.
- Child Adult Height Predictor How tall might your child be? A family target range and a growth-chart projection.
Calories & nutrition 11
- BMR Calculator (Mifflin-St Jeor, Harris-Benedict) Your basal metabolic rate from eight published equations, in kcal and kJ.
- Food Nutrition Facts Lookup Calories and 40 nutrients with % Daily Value for 13,500 USDA foods, searched on-device.
- Protein Intake Calculator How much protein you need a day and per meal, from the IOM, ICMR-NIN, ISSN and PROT-AGE.
- TDEE & Daily Calorie Calculator Calories a day to maintain, lose or gain weight — two methods, kcal or kJ.
- Calorie Deficit & Weight Loss Planner Daily calories to reach your goal weight, from the NIH body-weight model.
- Daily Water Intake Calculator Your daily water from EFSA and IOM reference intakes, plus exercise — and a glass counter.
- Macro Calculator (Protein, Carbs, Fat) Daily and per-meal grams of protein, carbs and fat for your calorie target.
- Recipe Nutrition Calculator Calories and nutrients of a whole recipe per serving and per 100 g, from USDA data.
- Nutrition Facts Label Generator Pro tool FDA, FSSAI and EU nutrition labels with each regulation’s rounding — SVG, PNG and PDF.
- Vitamin & Mineral RDA Calculator Your daily vitamin and mineral needs and upper limits, from NASEM, ICMR-NIN or EFSA.
- Intermittent Fasting Calculator & Timer Your eating window for 16:8, 5:2 and more, plus a fasting timer with history.
Fitness & training 10
- Heart Rate Zone Calculator (Karvonen) Your maximum heart rate and training zones in bpm, by Karvonen or % of max.
- One-Rep Max (1RM) Calculator Your estimated 1RM from a submaximal set, with training loads by percentage and rep max.
- Calories Burned Calculator (MET) Calories for any activity from published METs, and your week against the WHO guideline.
- Running Pace Calculator Pace, time or distance for any run, with splits, track laps and a printable pace band.
- Steps to Km/Miles & Calories Calculator Steps to distance and back, with walking time, calories and what research found on steps.
- Race Time Predictor Equivalent race times from one result, a marathon reality check and five training paces.
- VO2 Max Calculator (Fitness Tests) Your VO₂ max from five field tests, with METs and how it compares for your age and sex.
- Powerlifting Score Calculator (IPF GL, DOTS, Wilks) Compare lifters of any bodyweight with IPF GL points, DOTS, Wilks and Wilks2.
- Barbell Plate Calculator Plates per side for any target, with the plates you actually have.
- HIIT & Tabata Interval Timer Intervals, circuits, EMOM and AMRAP with beeps and voice cues — it works offline.
Pregnancy, periods & baby 7
- Pregnancy Week Calculator & Timeline Weeks pregnant, trimester and every antenatal check — dated for you.
- Period Tracker & Calculator (Private) Track your cycle on your own device — predictions, cycle checks, no account, no upload.
- Ovulation & Fertile Window Calculator Your fertile window, ovulation day and test dates for the next six cycles.
- Pregnancy Due Date Calculator Your estimated due date, how far along you are and the key dates ahead.
- Conception Date Calculator Work back from a due date, birth date, last period or IVF transfer to the conception date.
- Pregnancy Weight Gain Calculator Your pregnancy weight gain against the IOM ranges for your BMI, tracked week by week.
- hCG Doubling Time Calculator Doubling time and 48-hour change from two or more beta-hCG blood results.
Clinical calculators 4
- Blood Pressure Checker & Log What your blood pressure numbers mean — and a home log your doctor can use.
- HbA1c to Average Glucose Calculator (eAG) Turn an HbA1c result into the average glucose it reflects — and back.
- Blood Sugar Converter (mg/dL ↔ mmol/L) Convert glucose readings and see which range they fall in — test by test.
- eGFR Calculator (CKD-EPI 2021) Your eGFR from a creatinine result, with the KDIGO stage and risk colour.
Mental health & lifestyle 7
- Sleep Cycle Calculator (Bedtime & Wake-up) Bedtimes and wake-up times that fit whole sleep cycles, plus how much sleep you need.
- Smoking Cost & Pack-Year Calculator Cost, pack-years and screening check — plus a quit tracker, craving diary and pledge card.
- Breathing Exercise Timer (Box, 4-7-8, Coherent) Follow the circle: box, 4-7-8, coherent breathing or a cyclic sigh, with gentle cues.
- Blood Alcohol (BAC) Estimator Estimated BAC now, at its peak and back to zero — never a guide to whether you can drive.
- Life Expectancy Calculator (UN Life Tables) Average years ahead for your age, sex and country, from UN life tables.
- Caffeine Intake & Half-Life Calculator Today’s caffeine against EFSA and FDA guidance, and how much is left at bedtime.
- Alcohol Units & Standard Drinks Calculator UK units, standard drinks, grams and calories for any drink, and a weekly check.
Calculators 4
- Basic Calculator A desk calculator that never drifts: exact decimals, % that works, and a paper tape.
- Scientific Calculator Type or tap: trig, logs, roots and constants, with exact answers when they exist.
- Graphing Calculator Plot equations, curves and regions, then trace them, slide them and share them.
- Big Number Calculator Every digit exact: huge sums, products, powers, roots and factorials.
Numbers & arithmetic 20
- Multiplication Table Generator Any times table, a highlighted multiplication chart and a timed quiz, printable as PDF.
- Prime Factorization & Factors Calculator 360 = 2³ × 3² × 5 — with the factor tree, the ladder and every factor.
- Ratio & Proportion Calculator Simplify, solve, scale and share ratios — with every step shown.
- LCM & HCF (GCD) Calculator HCF and LCM with the working shown three ways — prime factors, ladder and Euclid.
- Significant Figures Calculator Counts sig figs digit by digit, rounds correctly and applies the rules to + − × ÷.
- Number Base Converter Binary, octal, decimal, hex and every base to 36 — exact, with the working shown.
- Scientific Notation Calculator Standard form ⇄ a × 10ⁿ, E notation and SI prefixes — plus + − × ÷ with the steps.
- Fraction Calculator Exact fraction answers with the working shown — LCD, cross-cancelling and all.
- Roman Numeral Converter 1994 ⇄ MCMXCIV — with a strict notation check, dates and a full chart.
- Square Root & Cube Root Calculator Roots to any precision, simplified radicals with steps, and every complex root.
- Decimal to Fraction Converter Decimals, repeating decimals, fractions and percents — converted exactly, with the method.
- Logarithm & Antilog Calculator log, ln and log_b to high precision — with change of base, log laws and log tables.
- Number to Words Converter 12,34,567 → twelve lakh thirty-four thousand … — and back, exactly.
- Long Division Calculator Long division written out step by step, in the US/UK or Indian layout.
- Prime Number Checker & Generator Is it prime? Plus factors, next primes, the nth prime, π(x) and twin primes.
- Long Multiplication Calculator Column, grid or lattice multiplication written out with every carry.
- Order of Operations Calculator (BODMAS & PEMDAS) BODMAS/PEMDAS one step at a time, in exact fractions, with every rule named.
- Percent Error Calculator How far a measurement is from the accepted value — with the working shown.
- Rounding Calculator Decimal places, sig figs or any multiple — every rounding mode side by side.
- Exponent Calculator Exact powers, radical forms, bˣ = y solved and the exponent laws explained.
Algebra & equations 5
- Quadratic Equation Solver Any rearranged quadratic solved exactly three ways, with discriminant, vertex and graph.
- System of Equations Solver Linear systems in exact fractions — six methods, every step, and a graph for two unknowns.
- Factoring Calculator (Factor, Expand & Simplify) Complete factorisation over the integers with named steps, plus expand and simplify.
- Sequence & Series Calculator (AP, GP & Pattern Finder) Arithmetic, geometric and harmonic progressions, pattern finder and exact Σ / Π.
- Equation Solver Solve for x: exact answers where they exist, every root checked, both sides graphed.
Geometry & trigonometry 10
- Circle Calculator One value gives the rest — plus arcs, sectors, segments and the circle’s equation.
- Area Calculator Area and perimeter of 22 flat shapes, with the formula, every step and a labelled diagram.
- Slope & Line Equation Calculator Two points, a point and slope, or an equation — every form of the line, with steps.
- Distance, Midpoint & Section Formula Calculator Distance, midpoint and section formula in 2D or 3D, with every step and a plot.
- Volume Calculator Volume of 14 solids with steps and diagrams, in litres, m³, ft³ or gallons, plus weight.
- Surface Area Calculator CSA, LSA and TSA of 14 solids with formulas, slant-height working and diagrams.
- Trigonometry Calculator Six functions and their inverses, exact values, equations and identity checks.
- Triangle Calculator Any three values give every side, angle, height, median, radius and centre — with steps.
- Unit Circle Chart & Calculator Drag the point to see (cos θ, sin θ) — and print a unit circle chart.
- Pythagorean Theorem Calculator a² + b² = c² with every step: exact surds, the converse, box diagonals and triples.
Calculus 2
Statistics & probability 7
- Standard Deviation Calculator σ and s with the full working — for lists, frequency tables and class intervals.
- Mean, Median, Mode & Average Calculator Every kind of average with the working — lists, frequency tables and class intervals.
- Z-Score & Normal Distribution Calculator z-scores, normal probabilities and percentiles — with a shaded bell curve and a z-table.
- Probability Calculator Exact answers with the working — from coin tosses and dice to Bayes’ theorem.
- Permutation & Combination Calculator Exact counts with the formula and steps — and the actual arrangements for small cases.
- Descriptive Statistics Calculator Every summary statistic of your data, with a box plot, histogram and stem-and-leaf.
- Sample Size Calculator How many to ask or measure — for a survey, a mean or a comparison of two groups.
Motion & forces 6
- Speed, Distance & Time Calculator Speed, distance or time from the other two — in any units, with the working shown.
- Acceleration Calculator Acceleration three ways — or any other variable — with g-force and 0–100 km/h times.
- SUVAT Calculator (Kinematic Equations) Any three of s, u, v, a, t in — the other two out, with both roots and every substitution.
- Force Calculator (Newton’s Second Law) F = ma for any variable, weight on any planet, and the resultant of several forces.
- Projectile Motion Calculator Range, height and flight time from any launch — with air drag and a target solver.
- Free Fall Calculator (with Air Resistance) How long a fall takes and how fast it ends — with or without air resistance.
Energy, heat & fluids 3
- Kinetic Energy Calculator KE = ½mv² for any variable, spinning and rolling objects, and a relativity check.
- Density Calculator ρ = m/V for any variable, shape volumes, specific gravity and a float-or-sink check.
- Specific Heat & Heat Energy Calculator q = mcΔT for any variable, phase changes with latent heat, and calorimetry.
Chemistry 13
- Dilution Calculator (C1V1 = C2V2) & Serial Dilutions C₁V₁ = C₂V₂, mixing, serial dilutions and dilution ratios — with the volumes to pipette.
- Molar Mass Calculator Molar mass, % composition and more from any formula, with IUPAC 2024 atomic weights.
- Grams to Moles Calculator Mass, moles, particles and gas volume of any substance, with every step shown.
- pH Calculator Exact pH of acids, bases, salts and mixtures — or convert pH, pOH, [H⁺] and [OH⁻].
- Chemical Equation Balancer Smallest whole-number coefficients for any reaction, checked atom by atom.
- Ideal Gas Law Calculator (PV = nRT) PV = nRT in any units, plus gas density, molar mass, STP volumes and real gases.
- Gas Laws Calculator (Boyle, Charles, Combined) Two-state gas laws, partial pressures, gas over water and effusion — in any units.
- Stoichiometry & Limiting Reactant Calculator Limiting reactant, excess, theoretical and percent yield — step by step.
- Electron Configuration Calculator Any element or ion: configuration, orbital diagram, exceptions and quantum numbers.
- Empirical & Molecular Formula Calculator From percentages, masses or combustion data to a formula, with every rounding shown.
- Interactive Periodic Table Every element’s data, trend heat maps, search, filters and side-by-side comparison.
- Lewis Structure Generator (with VSEPR Shape) Lewis structures with formal charges and resonance, plus VSEPR shape and polarity.
- Molarity Calculator Mass to weigh, molarity or volume — with a ready-to-follow preparation recipe.
Biology & genetics 3
- Punnett Square Calculator Any cross from Aa × Aa to a 256-square tetrahybrid, with ratios and a χ² test.
- DNA to Protein Translator (Transcription & Translation) DNA → mRNA → protein in any frame and any NCBI genetic code, with an ORF finder.
- Reverse Complement Generator (DNA/RNA) Reverse-complement any DNA or RNA — FASTA, GenBank or plain — with IUPAC codes.
Weather & environment 4
- AQI Calculator (US EPA & India NAQI) Pollutant readings to AQI, category and health advice — US EPA or India CPCB.
- Dew Point, Humidity & Wet-Bulb Calculator Dew point, humidity and wet bulb from any one humidity reading, in °C or °F.
- Heat Index Calculator (Feels-Like Temperature) How hot it feels: the NWS heat index, its risk category, humidex and apparent temperature.
- Wind Chill Calculator & Frostbite Time How cold the wind makes it feel, and how fast exposed skin can freeze.
Astronomy & sky 3
- Moon Phase Calculator & Moonrise Times Today’s Moon or any date’s — phase, moonrise, supermoons and eclipses.
- Sunrise, Sunset & Golden Hour Calculator Sun times for any place and date — twilight, golden hour and day length included.
- Weight & Age on Other Planets How much you’d weigh — and how old you’d be — on other worlds, from NASA data.
Engineering & Electronics Calculators
31 tools Browse by group: Engineering & Electronics Calculators →Electrical & power 10
- Motor Torque, Power & Speed Calculator Torque ↔ power ↔ speed, slip and motor current — with every formula shown.
- Ohm's Law Calculator Any two of V, I, R and P give the other two — with the working shown.
- Battery Life & Backup Time Calculator Device runtime, inverter backup, cell packs and charge time — formulas shown.
- Watts to Amps Calculator (kW, kVA, HP) kW, kVA, amps and horsepower for DC, single-phase and three-phase loads.
- mAh to Wh Converter mAh ↔ Wh at the battery’s voltage, power-bank output and the airline Wh limits.
- Three-Phase Power Calculator Balanced or per-phase loads: kW, kVA, kvar, neutral current and unbalance.
- Solar Panel & Battery Size Calculator Panels, batteries and controller for your daily kWh — NASA sun data for 237 cities.
- Voltage Drop Calculator Drop in volts and percent, load voltage and cable losses — with the formula shown.
- Cable Size Calculator Smallest cable for voltage drop and short circuit — and which check governs.
- Wire Gauge Converter (AWG, SWG, mm²) AWG and SWG to mm, mm², kcmil and the nearest metric size — with printable charts.
Electronics & circuits 10
- Capacitor Code Calculator Read any capacitor marking, or find the codes for a value — in pF, nF and µF at once.
- PCB Trace Width Calculator Trace width, current, temperature rise, resistance and vias — every formula shown.
- Karnaugh Map Solver Minterms, a truth table or an expression in — minimal SOP and POS out, groups drawn.
- Series & Parallel Resistor Calculator Combine parts, solve whole networks and make odd values from two standard parts.
- Voltage Divider Calculator Divider output, the resistors for a target voltage, and bridges — with the load included.
- LED Resistor Calculator The right resistor for your LEDs, its wattage, the real current and the power wasted.
- RC, LC & Active Filter Calculator Cutoff from parts, or parts from a cutoff — with standard values and a Bode plot.
- Resistor Color Code Calculator Colours to ohms and ohms to colours — IEC 60062:2016, with the E-series check.
- 555 Timer Calculator Frequency and duty cycle from parts, or parts for your frequency — with E-series values.
- SMD Resistor Code Calculator Read chip-resistor markings or find the code for a value — every scheme, both ways.
Mechanical & machining 5
- Metal Weight Calculator Weight of any bar, plate, tube or section — per metre, per piece and for the whole order.
- Gear Ratio & Spur Gear Calculator Tooth counts in — ratio, speed, torque, direction and gear dimensions out.
- Bolt Torque & Preload Calculator Torque for a target preload — or preload from a torque — with every formula shown.
- Tap Drill Size & Thread Calculator The right drill for any tap, the thread it gives and the nearest stock drills.
- Speeds & Feeds Calculator RPM, feed rate, metal removal and power — metric or inch, with every formula shown.
Fluids & piping 3
- Reynolds Number Calculator Laminar or turbulent? Re for a pipe, duct, channel or plate, with real fluid properties.
- Pipe Pressure Drop Calculator Friction, fittings, valves and lift — the head your pump has to deliver, with the working.
- Tank Volume Calculator Volume at any liquid level for tanks with real heads — plus mass, ullage and a dip chart.
Concrete & masonry 6
- Concrete Calculator (Slab, Footing, Column, Tube & Steps) Add up every slab, footing, column and step — then get m³, yd³, bags and truckloads.
- Concrete Mix Calculator — Cement, Sand & Aggregate (IS 456) Cement bags, sand and aggregate for M5–M20 concrete, checked against IS 456.
- Brick Calculator — Bricks, Mortar, Cement & Sand Bricks, mortar, cement and sand for any wall — IS 1077, UK or US brick sizes.
- Plaster & Screed Calculator Cement and sand for walls, ceilings and floor screeds, with IS 1661 thickness guidance.
- Concrete Mix Design Calculator (IS 10262:2019) Every IS 10262 step for an M10–M60 trial mix, checked against IS 456 durability limits.
- Block Calculator — Concrete, CMU & AAC Blocks Blocks, mortar or adhesive and grout for any block wall — IS 2185 and US CMU sizes.
Steel & reinforcement 4
- Rebar (TMT Steel) Weight Calculator Steel weight from bar size, length and count — IS 1786, D²/162 and US bar sizes.
- Bar Bending Schedule (BBS) Calculator A complete BBS — shapes, cutting lengths, counts, laps and steel weight by diameter.
- Reinforcement Steel Quantity Estimator Quick rebar take-off for slabs and members, with the IS 456 limits checked.
- Structural Steel Weight Calculator (Plates, Pipes, Angles, Beams) IS 808 sections, plates, bars and tubes — kg per metre, per piece and for the whole list.
Plans, property & costs 10
- Labour Attendance (Hajri) Register & Wage Sheet (India) For India Pro tool Daily hajri, advances and the weekly payday for your site labour — kept on your phone.
- Land Area Converter — Bigha, Guntha, Cent, Marla, Acre Land units by state, from official records — or your own local bigha.
- Plot Area Calculator (Irregular Land) Measure the sides and a diagonal — get the area, a sketch and land units.
- Carpet Area Calculator (RERA) — Built-up & Super Built-up For India Carpet area as RERA defines it — and what the builder’s super area really means.
- Square Footage & Room Area Calculator Add up rooms and plots of any shape in sq ft, m², gaj or acres.
- Stamp Duty & Registration Charges Calculator For India & UK What the registry will cost — state presets with sources, or your own rates.
- House Construction Cost Calculator Your area × your rate, split into stages with a payment plan you can share.
- Daily Wage Calculator for Site Labour Days × rate + overtime − advances = what each worker gets, for one person or a crew.
- Daily Progress Report (DPR) Maker for Construction Sites Pro tool A site daily progress report with BOQ progress, manpower and photos — a PDF in minutes.
- Site Inspection Checklist & Snag List for Construction Pro tool Tick through a pre-pour or handover checklist, photograph the snags and share a PDF.
Grades & GPA 9
- CGPA to Percentage Calculator For India CGPA to percentage by the official rule of your board or university, with the source.
- GPA Calculator Term and cumulative GPA from letter or percentage grades and credits, with the working.
- Grade Calculator Your course grade from weighted categories or points — plus what you need on the rest.
- Marks Percentage Calculator For India Total, percentage and best-of-five from your subject marks, with a pass check.
- Attendance Calculator Your attendance %, the classes you need for 75% and the ones you can still miss.
- Final Grade Calculator What you need on the final for each letter grade, and the grade a final score gives you.
- Test Grade Calculator Number wrong → percentage and letter grade, with a printable chart for the whole test.
- SGPA Calculator For India Semester grade point average from credits and grades, with the working and backlogs shown.
- CGPA Calculator For India CGPA from your semester SGPAs and credits, with what-if semesters and a target planner.
Citations & references 4
- APA Citation Generator (7th Edition) APA 7 references and in-text citations, with autofill from a DOI, ISBN or URL.
- MLA Citation Generator (9th Edition) MLA 9 Works Cited entries and in-text citations, built from the core elements.
- Chicago Citation Generator (18th Edition) Chicago 18 notes, bibliography and author-date citations, with a Turabian mode.
- Harvard Referencing Generator Cite Them Right Harvard references, with switches for your university’s version.
DNS & domains 4
- DNS Lookup Every DNS record type, straight from Cloudflare or Google, explained in plain words.
- DNS Propagation Checker Is your new DNS record visible yet? Compare public resolvers and locations at once.
- WHOIS Lookup (RDAP) Registration data for any domain, IP address or AS number, from the official registry.
- Domain Availability Checker Is the name free? Ask DNS and the official registries for many TLDs at once.
Email authentication 4
- MX Lookup Which servers receive mail for a domain — and can senders actually reach them?
- SPF Record Checker Find out which servers may send mail for a domain — and why yours might fail.
- DMARC Record Checker See what receivers do with mail that fails DMARC — and how to get to reject.
- DKIM Record Checker Is your DKIM key published, strong enough and usable? Check any selector.
Websites & HTTP 5
- Website Down Checker Down for everyone or just you? One check from Cloudflare, one from your browser.
- URL Expander Find out where a short link really goes — without clicking it.
- Robots.txt URL Tester See which crawlers may fetch a URL — and the exact rule that decides it.
- Link Extractor Every link on a page, with its anchor text and rel values — ready to filter and export.
- HAR File Analyzer & Sanitizer See what a page loaded and why it was slow — then clean the file before sending it.
IP addresses & lookups 5
- IP Address Lookup Who holds an IP address, which network routes it, and what it is used for.
- What Is My IP Address Your public IP address — IPv4 and IPv6 — and what it tells websites about you.
- Website Hosting Checker Who hosts a website, who runs its DNS and who handles its e-mail.
- Abuse Contact Finder Who to tell about spam, phishing or attacks — taken from the registries’ own records.
- Port Number Lookup What runs on a port, what IANA says about it, and whether it should face the internet.
Subnets & addressing 6
- MAC Address Lookup Who made a network device — and whether its MAC address is real, random or multicast.
- Subnet Calculator Everything about an IP subnet: network, broadcast, host range, masks and splits.
- VLSM Calculator Divide one IPv4 network into right-sized subnets, without overlaps or guesswork.
- IP Range to CIDR Converter Ranges to CIDR, CIDR to ranges, merged lists and exclusions — ready for your firewall.
- Subnet Mask Cheat Sheet Every subnet mask on one page — search it, apply it to an address, print it.
- IP Address Converter Any IP address in every notation — and what the registries say about it.
Passwords & 2FA 7
- Password Strength Checker How long would your password survive an attack? Find out without it leaving your device.
- Passphrase Generator (Diceware) Memorable random passphrases from the EFF word lists — or from your own dice.
- Pwned Password Checker See if a password has leaked in a data breach — without sending the password.
- Bcrypt Hash Generator & Verifier Create and verify bcrypt hashes in your browser, with timing and the 72-byte check.
- TOTP / HOTP Code Generator Live 2FA codes from a secret, setup QR codes and authenticator backups, on your device.
- Argon2 Hash Generator & Verifier Argon2id hashes with OWASP and RFC 9106 settings, made and checked on your device.
- .htpasswd Generator Password lines and config for Apache and nginx Basic authentication, made on your device.
Encrypt & hash 6
- Encrypt / Decrypt Text (AES-256) Password-protect a message, send it anywhere, decrypt it here — even offline.
- File Encryption & Decryption Lock any file with a password — big files too — and unlock it on any device.
- HMAC Generator Keyed hashes for API and webhook signatures — compute, verify and get the code.
- PGP Encrypt / Decrypt OpenPGP encryption, decryption, signatures and key details — nothing leaves your device.
- AES Encryption Tool (Developer) AES-GCM, CBC and CTR with raw keys, for test vectors and interoperability debugging.
- Password-Protected ZIP Creator AES-256 encrypted ZIP archives made and opened on your device.
Keys, certificates & tokens 6
- SSL Certificate Decoder Paste a certificate, a chain or a CSR: every field decoded, every problem explained.
- CSR Generator A key and a CSR for your SSL certificate, made on your device — the key never leaves it.
- RSA Key Pair Generator RSA key pairs in every format — PEM, JWK, SSH — made in your browser, self-tested.
- API Key & Secret Generator Cryptographically random API keys and framework secrets, made only on your device.
- PGP Key Generator Your own PGP key pair, with revocation certificate, made privately in your browser.
- Elliptic Curve Key Generator (ECDSA / Ed25519 / X25519) EC key pairs in PEM, JWK, raw hex and OpenSSH formats, generated in your browser.
Privacy & safety checks 3
- Email Header Analyzer Trace where an email came from, and whether it is really from its sender.
- Suspicious Link Checker See where a link really goes, and the tricks it uses, without opening it.
- PII Redactor (Mask Personal Data) Hide personal data in logs, tickets and prompts: masked, tagged or swapped for stand-ins.
Classic ciphers & encodings 3
- Vigenère Cipher Encoder & Decoder Encrypt with a keyword, decrypt, or let Kasiski and Friedman find a lost key.
- Caesar Cipher Encoder & Decoder Shift letters by any amount — or let frequency analysis find the shift for you.
- ROT13 / ROT47 Encoder & Decoder Rotate letters, digits or all printable ASCII — the same step encodes and decodes.
All-in-one converters 10
- Length Converter Exact length conversions with feet and inches, inch fractions and every unit at once.
- Time Unit Converter Exact durations in every unit, with a days-hours-minutes breakdown and ISO 8601.
- Data Storage Converter Exact bits and bytes in decimal and binary units — and why 1 TB shows as 931 GB.
- Weight Converter Exact weight conversions with lb + oz, st + lb and traditional Indian units.
- Data Rate Converter (Mbps to MB/s) Bits per second to bytes per second and back — 100 Mbps is 12.5 MB/s.
- Temperature Converter Exact °C, °F and K conversions with the formula worked step by step.
- Area Converter Exact area conversions, a length × width helper and fixed Indian land units.
- Pressure Converter Exact pressure and stress units, with psig ↔ psia and barg ↔ bara.
- Volume Converter Exact volume conversions, US and UK measures, and an L × W × H box helper.
- Speed Converter Exact speed conversions, Mach numbers by altitude and the ×5/18 shortcut.
Length & distance 5
- Feet to Meters Converter Exact ft ↔ m with feet and inches, centimetres, printable tables and the US survey foot.
- KM to Miles Converter Exact km ↔ miles with nautical miles, race distances from 5K to marathon and road charts.
- CM to Inches Converter Exact cm ↔ inches, with tape-measure fractions, feet and inches and printable tables.
- MM to Inches Converter (with Fractions) Exact mm ↔ inches with the nearest 1/8–1/64 inch and its error, thou and a fraction chart.
- Height Converter (cm to Feet and Inches) Body height in feet and inches, centimetres and metres — typed any way you like.
Area & volume 3
- Liters to Gallons Converter Exact L ↔ gal, US or imperial, with quarts and pints, tank tables and price per gallon.
- Square Feet to Square Meters Converter Exact sq ft ↔ m², rooms in feet and inches, gaj, guntha and price per sq ft or per m².
- Acres to Hectares Converter Exact acre ↔ hectare with sq ft, m², guntha and cents, square-plot sides and farm tables.
Cooking & kitchen 3
- mL to Fluid Ounces Converter Exact mL ↔ fl oz in US and UK ounces, the 30 mL label rule and the 3.4 oz liquids limit.
- Cups to Grams Converter Cups and spoons to grams and back for 100+ ingredients, each from a cited USDA record.
- Cups to mL Converter (Cooking Measures) Every cup and spoon — US, label, metric, Australian, UK and Japanese — in mL and back.
Dates & calendars 12
- Time Zone Converter See one moment in many cities and find meeting hours that suit everyone.
- Age Calculator Exact age on any date, totals in days and weeks, and your next birthday.
- Date Calculator Days between dates, working days, and any date plus or minus a duration.
- Nepali Date Converter (BS to AD, AD to BS) For Nepal Bikram Sambat to English dates and back, with today’s Nepali date and age in BS.
- Printable Calendar Month, year and planner calendars for any year — print them or save an A4 or Letter PDF.
- Week Number Calculator Today’s week number, the week of any date and the dates of any week.
- Time Duration Calculator Hours between two times or dates, minus breaks, totalled across as many rows as you need.
- Time Calculator Clock time ± hours, duration sums, decimal hours and military time in one place.
- Calendar Converter One date in 15 calendars at once — Hijri, Persian, Hebrew, Saka, Bangla, Chinese and more.
- Day of the Week Calculator The weekday of any date, worked out step by step, in the Gregorian or Julian calendar.
- Public Holidays List Official holiday lists with long weekends, bridge days and calendar export.
- Retirement Date Calculator For India Your superannuation date under FR 56 or the exact-birthday rule, and the time left.
Timers & clocks 6
- Countdown Timer Live days, hours, minutes and seconds until any date, in any time zone.
- Stopwatch Start, pause and record laps with split times — exact even in background tabs.
- Timer Presets or any duration, several at once, with an alarm that rings until you stop it.
- World Clock The time in every city you care about, day or night at a glance, and a full-screen clock.
- Online Alarm Clock Alarms with repeat days, snooze and a countdown — right in your browser tab.
- Interval Timer Work and rest intervals, rounds and sets, with beeps, voice cues and a big colour display.
Money & everyday maths 6
- Currency Converter Cross rates for 30 currencies from the ECB’s daily euro reference rates.
- Itemised Bill Split Calculator Who had what, who pays what — exact shares with tax, tip and UPI QR codes.
- Electricity Bill & Appliance Cost Calculator Units, the bill and what each appliance costs — with your own tariff.
- Group Expense Splitter (Settle Up) Who paid, who owes — and the fewest payments to settle up.
- Number to Words — Amount in Words (Rupees) Amounts in words for cheques and invoices — lakh, crore, million, Hindi and ordinals.
- IFSC Code Finder & Validator For India Find or check an IFSC — 1.8 lakh bank branches, searched on your device.
Measure & locate 4
- Unit Converter Exact conversions for 14 kinds of units, with the formula and a full table.
- Online Ruler — Actual Size (cm, mm, inches) A real-size ruler on your screen — calibrate it with any bank card, then measure.
- Prayer Times (Namaz Timings) for Any Location Namaz timings for any city or your location, with monthly and Ramadan timetables.
- PIN Code Finder (India Post) For India Every Indian PIN code and post office — search by number, place or district.
Travel & vehicles 4
- Mileage Calculator (Bike & Car km/L) Real-world mileage from your own fill-ups — one tank or a running log.
- Fuel Cost Calculator for Trips Fuel, tolls and time for any trip — split between everyone in the car.
- International Calling Codes & How to Dial Country codes, exit codes and the exact digits to dial — with the time there now.
- Flight Arrival Time Calculator When you land in local time, the +1 or −1 day, and the time back home.
Games, sports & random 8
- Random Generator Fair, secure random numbers, list picks, shuffles, coin flips, dice and colours.
- Dice Roller (d4 to d100) Fair virtual dice with holds, a history and the exact chance of every total.
- Spin the Wheel — Random Picker Wheel Type your options, spin, and let a fair wheel decide.
- Coin Flip — Heads or Tails A fair, animated coin toss — with best-of matches, a tally and streak odds.
- Random Team Generator (Balanced by Skill) Fair teams in one click — random, or balanced by skill, with your rules.
- Secret Santa Generator (No Email) Fair Secret Santa draws with exclusions — private links or printed slips, no accounts.
- Bingo Card Generator (75-Ball, 90-Ball, Words) Unique printable cards, a fair caller and a winner checker for any bingo game.
- Tambola / Housie Ticket Generator & Caller Standard Housie tickets, a fair number caller and a claim checker — free, no sign-up.
Device & PC tests 5
- CPS Test — Clicks per Second How fast can you click? Live CPS, a click-timing chart and your best scores.
- Keyboard Tester — Test Every Key See every key light up as you press it, with codes, rollover, chatter and repeat rate.
- Mouse Tester (Buttons, Double Click, Scroll) Check every button, the wheel, double-clicks, chatter, drags and the polling rate.
- Dead Pixel Test & Touch Screen Test Fill the screen with test colours to spot dead pixels, and map touch dead zones.
- What Is My Screen Resolution? Your screen’s resolution, scaling, colour and refresh rate — and its PPI and real size.
Sound & music 4
- White, Pink & Brown Noise Generator Six colours of noise, mixable and shaped, with a sleep timer — made live in your browser.
- Online Tuner (Guitar, Ukulele, Violin, Chromatic) A chromatic tuner in your browser: note, cents, needle and swara, analysed on your device.
- Tanpura & Shruti Box Online A tanpura and shruti-box drone in any Sa, for singing and instrument practice.
- Chord Transposer & Capo Calculator Move any chord sheet to a new key, and find the capo for easy chord shapes.
Home, food & pets 6
- Dog Age Calculator (Dog Years to Human Years) Dog years to human years by size, with the DNA-clock formula and your dog’s life stage.
- Recipe Scaler — Scale Servings & Pan Size Paste the ingredients, pick the servings, get amounts you can measure.
- Tally Counter (Jap / Tasbih Counter) Tap to count — for japa, tasbih, scores, people or stock.
- Marriage Biodata Maker A print-ready marriage biodata in your language, with photo — made on your device.
- To-Do List & Shopping List Tasks, shopping, packing and daily habits — private, offline and free.
- Zodiac Sign Finder Your star sign, Chinese animal, birthstone and planet ages — facts, not forecasts.
Codes & files 6
- ZIP & RAR Extractor Unpack ZIP, RAR, 7z and TAR archives on your device — nothing is uploaded.
- Barcode Scanner Online (Camera or Image) Read any barcode on your device, with its check digit, GTIN, batch and expiry explained.
- Morse Code Translator With Audio Text to International Morse code and back, with sound, light, vibration and a key.
- Duplicate File Finder Find identical files — and look-alike photos — across your folders, on your device.
- Batch File Renamer Pro tool Rename many files with numbers, dates and find & replace — preview first.
- 3D Model Converter Convert STL, OBJ, PLY, glTF and 3MF files, fix units and orientation, check the size.
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Social Media Tools
18 tools Browse by group: Social Media Tools →Write & check posts 6
Fonts, symbols & formatting 5
Images, video & sizes 2
YouTube 2
Links & sharing 1
Growth & analytics 2