Categories
919 tools (798 free) in 22 categories. Most run entirely in your browser, so what you open stays on your device.
Collections
Tools from several categories, gathered for one kind of work.
- 174 tools Students Grades, marks & exams · Essays & writing · Citations & references · 4 more
- 197 tools Developers JSON, YAML & data formats · Format, convert & run code · Encode, decode & hash · 5 more
- 118 tools Creators & social media Posts, captions & hashtags · YouTube · Images & graphics · 3 more
- 107 tools Small business & tax Invoices & billing · GST, VAT & tax · Pricing, profit & stock · 4 more
- 101 tools Finance & CA Income tax & TDS · GST & compliance · Returns & valuation · 4 more
- 43 tools HR & payroll Salary & take-home pay · PF, gratuity & tax · Time, leave & rosters · 2 more
- 48 tools Health & fitness Weight & body · Calories & nutrition · Workouts & training · 2 more
- 95 tools Engineers Electrical & electronics · Mechanical, fluids & HVAC · Civil & construction · 3 more
- 42 tools Construction & home Concrete, bricks & steel · Finishes, roofs & outdoors · Electrical, water & cooling · 2 more
- 66 tools Legal paperwork Agreements & contracts · Affidavits & declarations · Notices & complaints · 4 more
All categories
All tools →-
Developer Tools
132 toolsDeveloper tools, most of them free: format and validate JSON, encode Base64 and URLs, decode JWTs, test regex, generate UUIDs and hashes in your browser.
- JSON & data formats , 22 tools
- Formatters & minifiers , 9 tools
- Encode, decode & hash , 19 tools
- Code converters , 12 tools
- Test & debug , 14 tools
- Editors & playgrounds , 6 tools
- Generators , 40 tools
- Calculators & reference , 10 tools
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Data & Spreadsheet Tools
40 toolsData tools, most of them free: view and edit CSV and Excel files, convert between CSV, JSON, Excel and SQL, clean and de-duplicate data and make charts.
- Chart Maker (Graph from Data)
- CSV Editor & Viewer
- Excel Viewer (XLSX, XLS, ODS, Numbers)
- LaTeX Table Generator
- Bar Graph Maker
- Open & edit files , 4 tools
- Convert data , 15 tools
- Clean & transform , 4 tools
- Merge, split & compare , 5 tools
- Charts & graphs , 8 tools
- Tables & templates , 4 tools
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Text Tools
95 toolsCount words and characters, change case, remove duplicate lines, sort and clean text, compare two texts and make placeholder copy, mostly free, in your browser.
- Count & measure , 10 tools
- Check & compare , 8 tools
- Clean & format , 11 tools
- Lines & lists , 8 tools
- Extract & convert , 20 tools
- Read & listen , 1 tool
- Type & write , 5 tools
- Languages & scripts , 5 tools
- Words & fun text , 16 tools
- Generate text , 11 tools
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Image Tools
92 toolsCompress, resize, crop and convert images (JPG, PNG, WebP) in your browser. Generate favicons and QR codes. Your photos are never uploaded.
- Compress & resize , 4 tools
- Convert formats , 24 tools
- Edit & enhance , 17 tools
- Background & AI , 9 tools
- Photos for forms & print , 5 tools
- GIFs & animation , 7 tools
- Create graphics , 18 tools
- Inspect & colours , 8 tools
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PDF Tools
55 toolsMerge, split and extract PDF pages, view PDF metadata, convert PDF pages to images and reduce PDF size — processed in your browser without uploading.
- Organize pages , 5 tools
- Compress & optimize , 5 tools
- Convert from PDF , 10 tools
- Convert to PDF , 8 tools
- Edit & annotate , 6 tools
- Forms & mail merge , 3 tools
- Sign & protect , 5 tools
- View & check , 6 tools
- Print & paper , 5 tools
- Word & e-books , 2 tools
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Audio & Video Tools
35 toolsConvert, compress, trim and edit your own video and audio files in the browser — MP4, MOV, WebM, MP3, WAV and more. Files are processed locally, never uploaded.
- Merge Videos (Video Joiner) Pro tool
- MP4 to MP3 Converter Pro tool
- Screen Recorder
- Video Converter Pro tool
- Volume Booster (Audio & Video) Pro tool
- Convert & compress video , 7 tools
- Edit video , 8 tools
- Convert audio , 5 tools
- Edit audio , 4 tools
- Record & test , 5 tools
- Subtitles & transcripts , 3 tools
- Music tools , 3 tools
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Design & CSS Tools
56 toolsDesign tools, most of them free: color palettes, gradients, contrast checker, CSS generators for shadows, borders and layouts, plus SVG and icon helpers.
- Aspect Ratio Calculator
- Color Palette Generator
- Festival & Business Greeting Poster Maker (India) Pro tool
- Tailwind Color Palette Generator (50–950)
- Color Wheel & Harmony Finder
- Color , 10 tools
- CSS generators , 17 tools
- SVG & shapes , 7 tools
- Layout, print & screens , 5 tools
- Create graphics , 17 tools
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SEO Tools
36 toolsGenerate meta tags, Open Graph tags, robots.txt, XML sitemaps, canonical tags and JSON-LD schema markup, and check keyword density — SEO tools, mostly free.
- Meta Tag Generator
- Robots.txt Generator & Tester
- XML Sitemap Generator
- Open Graph Generator
- Schema Markup Generator
- Meta tags & snippets , 11 tools
- Sitemaps, robots & redirects , 6 tools
- Page & site checks , 8 tools
- Keywords & content , 4 tools
- Marketing & ads , 7 tools
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Finance Calculators
94 toolsLoan, mortgage, savings, investment, interest, inflation and salary calculators, plus tax tools such as VAT and India’s GST, each with a clear formula.
- Loans & EMI , 10 tools
- Savings & interest , 12 tools
- Investing & markets , 16 tools
- Retirement & insurance , 8 tools
- Income tax & GST , 13 tools
- Salary & pay , 15 tools
- Business maths , 4 tools
- Budgets & everyday money , 16 tools
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Business Tools
78 toolsCreate invoices and quotations, number invoices, and calculate profit, margin, markup and break-even point — private in your browser, most of it free.
- Invoice Generator Pro tool
- Quotation Generator Pro tool
- Invoice Number Generator
- Profit Calculator
- Margin Calculator
- Invoices & billing , 17 tools
- GST & compliance , 6 tools
- Pricing & profit , 9 tools
- HR & payroll , 24 tools
- Inventory & shipping , 1 tool
- Business finance , 7 tools
- Contracts & agreements , 5 tools
- Branding & documents , 9 tools
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Legal Templates & Calculators
39 toolsGeneric legal templates and calculators — rent agreements, NDAs, notices, limitation periods and interest on late payments — clearly explained, not legal advice.
- Legal Notice Generator Pro tool
- Rent Agreement Generator Pro tool
- Terms and Conditions Generator
- Cheque Bounce Notice Generator Pro tool
- Limitation Period Calculator
- Agreements & contracts , 9 tools
- Affidavits, wills & declarations , 6 tools
- Notices & complaints , 10 tools
- Policies & privacy compliance , 4 tools
- Deadlines & legal maths , 5 tools
- Law reference & checklists , 4 tools
- Review & prepare documents , 1 tool
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Health & Fitness Calculators
48 toolsBMI, BMR, calorie, body-fat, pregnancy and clinical reference calculators with the formula and source shown. For general information only — not medical advice.
- BMI Calculator (WHO & Asian Cut-offs)
- Heart Rate Zone Calculator (Karvonen)
- Ideal Body Weight Calculator
- Pregnancy Week Calculator & Timeline
- Blood Pressure Checker & Log
- Body measurements , 8 tools
- Calories & nutrition , 11 tools
- Fitness & training , 11 tools
- Pregnancy, periods & baby , 7 tools
- Clinical calculators , 4 tools
- Mental health & lifestyle , 7 tools
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Math Calculators & Solvers
51 toolsFree math tools: scientific and graphing calculators, fractions, equations, statistics, geometry, matrices, number bases and step-by-step working where possible.
- Basic Calculator
- Circle Calculator
- Matrix Calculator
- Multiplication Table Generator
- Prime Factorization & Factors Calculator
- Calculators , 4 tools
- Numbers & arithmetic , 21 tools
- Algebra & equations , 5 tools
- Geometry & trigonometry , 10 tools
- Calculus , 2 tools
- Matrices & vectors , 1 tool
- Statistics & probability , 8 tools
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Science Calculators
45 toolsPhysics, chemistry, astronomy and biology calculators: motion, energy, molar mass, pH, gas laws, half-life, moon phases, Punnett squares and more, with formulas.
- AQI Calculator (US EPA & India NAQI)
- Dilution Calculator (C1V1 = C2V2) & Serial Dilutions
- Kinetic Energy Calculator
- Molar Mass Calculator
- Punnett Square Calculator
- Motion & forces , 6 tools
- Energy, heat & fluids , 3 tools
- Waves, light & sound , 1 tool
- Electricity & magnetism , 7 tools
- Nuclear & modern physics , 1 tool
- Chemistry , 13 tools
- Biology & genetics , 3 tools
- Weather & environment , 4 tools
- Astronomy & sky , 3 tools
- Calculators & measurement , 4 tools
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Engineering & Electronics Calculators
31 toolsElectrical, electronics and mechanical calculators: Ohm's law, resistor codes, voltage drop, power, gears, beams and conversions — estimates with formulas shown.
- Capacitor Code Calculator
- HVAC BTU & Tonnage Calculator
- Metal Weight Calculator
- Motor Torque, Power & Speed Calculator
- Ohm's Law Calculator
- Electrical & power , 10 tools
- Electronics & circuits , 10 tools
- Mechanical & machining , 5 tools
- Structures & materials , 2 tools
- Fluids & piping , 3 tools
- HVAC & thermal , 1 tool
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Construction & Home Calculators
29 toolsConcrete, brick, tile, paint and steel quantity calculators, area and land-unit converters and home cost estimators — with the formulas and standards they use.
- Concrete Calculator (Slab, Footing, Column, Tube & Steps)
- Labour Attendance (Hajri) Register & Wage Sheet (India) Pro tool
- Paint Calculator
- Water Tank Capacity Calculator
- Concrete Mix Calculator — Cement, Sand & Aggregate (IS 456)
- Concrete & masonry , 6 tools
- Steel & reinforcement , 4 tools
- Paint, tiles & flooring , 2 tools
- Earthwork & outdoor , 2 tools
- Roofs, stairs & carpentry , 2 tools
- Electrical, water & cooling , 3 tools
- Plans, property & costs , 10 tools
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Education & Student Tools
80 toolsGPA and CGPA calculators, grade and attendance calculators, citation generators, typing tests and study tools for students and teachers — private, mostly free.
- APA Citation Generator (7th Edition)
- CGPA to Percentage Calculator
- GPA Calculator
- Math Worksheet Generator
- Grade Calculator
- Grades & GPA , 10 tools
- Exams & admissions , 2 tools
- Citations & references , 5 tools
- Writing & research , 10 tools
- Study & planning , 1 tool
- Practice & tests , 2 tools
- For teachers , 7 tools
- Math & subject calculators , 43 tools
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Network & Web Tools
36 toolsCheck HTTP headers, redirects and website status, look up DNS, WHOIS/RDAP and IP details, and calculate subnets — free network tools for developers and admins.
- DNS & domains , 4 tools
- Email authentication , 5 tools
- Websites & HTTP , 12 tools
- SSL/TLS & certificates , 3 tools
- IP addresses & lookups , 5 tools
- Subnets & addressing , 6 tools
- Connection & speed tests , 1 tool
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Security & Privacy Tools
35 toolsPassword strength, encryption, hashing, key and token generators, TOTP codes and privacy tools that run locally in your browser — what you enter never leaves it.
- Content Security Policy (CSP) Generator
- Encrypt / Decrypt Text (AES-256)
- Password Strength Checker
- Security Headers Checker
- SSL Certificate Decoder
- Passwords & 2FA , 9 tools
- Encrypt & hash , 6 tools
- Keys, certificates & tokens , 6 tools
- Web & email security , 5 tools
- Privacy & safety checks , 5 tools
- Classic ciphers & encodings , 4 tools
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Unit Converters
33 toolsConvert length, weight, temperature, area, volume, speed, data, energy, pressure and cooking units with exact conversion factors and handy conversion tables.
- KG to LBS Converter
- Length Converter
- mL to Fluid Ounces Converter
- Time Unit Converter
- Celsius to Fahrenheit Converter
- All-in-one converters , 10 tools
- Length & distance , 5 tools
- Weight & mass , 2 tools
- Temperature , 1 tool
- Area & volume , 4 tools
- Cooking & kitchen , 3 tools
- Digital, photo & music , 1 tool
- Science & engineering units , 2 tools
- Sizes & gauges , 1 tool
- Numbers & money , 4 tools
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Everyday Utilities
75 toolsUnit, currency and time zone converters, age and date calculators, countdown, stopwatch, timer and random generators — simple tools for everyday tasks.
- Dates & calendars , 14 tools
- Timers & clocks , 7 tools
- Money & everyday maths , 8 tools
- Measure & locate , 4 tools
- Travel & vehicles , 4 tools
- Games, sports & random , 10 tools
- Device & PC tests , 8 tools
- Sound & music , 4 tools
- Home, food & pets , 7 tools
- Codes & files , 9 tools