Network & Web Tools
Look up how a website or domain is set up and what it returns. URL checks run on MySmartCoPilot's server with strict safety limits; calculators such as the subnet calculator run in your browser.
All 36 network tools
Grouped by what they do.
DNS & domains
4 toolsLook up how a domain is set up.
- 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
5 toolsCheck and set up how a domain sends and receives email.
- Email Header Analyzer Trace where an email came from, and whether it is really from its sender.
- 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
12 toolsSee what a website returns and how it behaves.
- Security Headers Checker Grade a site’s security headers A+ to F and get copy-paste fixes for your server.
- HTTP Status Codes Reference Every HTTP status code explained: what it means, why you got it and how to fix it.
- Suspicious Link Checker See where a link really goes, and the tricks it uses, without opening it.
- Redirect Checker Follow a URL hop by hop and see what every redirect does.
- cURL to Code Converter Paste a curl command, get the same request in your language.
- HTTP Header Checker See what a server sends back, and what each header means for search.
Show all 12 Show fewer Websites & HTTP tools
- Website Down Checker Down for everyone or just you? One check from Cloudflare, one from your browser.
- Broken Link Checker Check every link on a page and see which are broken, blocked or redirected.
- 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.
SSL/TLS & certificates
3 toolsWork with TLS certificates and server settings.
- 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.
- SSL Certificate Checker Is HTTPS set up right? Certificate trust, redirects, HSTS, mixed content and CT logs.
IP addresses & lookups
5 toolsFind out about an IP address and who runs it.
- 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 toolsPlan IPv4 and IPv6 address ranges.
- 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.
Connection & speed tests
1 toolTest your connection and do network capacity sums.
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Network tools A–Z
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Collections with network tools
All collections →Good to know
- 13 of 36 tools run entirely in your browser; the other 23 explain on their pages what they send.
- 13 of 36 keep working without a connection once loaded.
- 25 of 36 tools use the network for part of their work; each one says on its page what it sends and where.
Other categories
All tools →- 132 tools Developer Format, validate, encode, decode.
- 40 tools Data CSV, Excel, tables, charts.
- 95 tools Text Count, clean, sort, compare.
- 92 tools Image Compress, resize, convert, crop.
- 55 tools PDF Merge, split, extract, convert.
- 35 tools Audio & Video Convert, trim, compress media.
- 56 tools Design Colours, gradients, CSS.
- 36 tools SEO Meta tags, sitemaps, schema.
- 27 tools Social Media Captions, previews, limits.
- 94 tools Finance Loans, savings, interest, tax.
- 78 tools Business Invoices, quotes, margins.
- 39 tools Legal Templates and legal maths.
- 48 tools Health BMI, calories, pregnancy.
- 51 tools Math Calculators and solvers.
- 45 tools Science Physics, chemistry, astronomy.
- 31 tools Engineering Electronics, electrical, mechanical.
- 29 tools Construction Materials, area, home costs.
- 80 tools Education Grades, citations, study.
- 35 tools Security Passwords, encryption, keys.
- 33 tools Converters Every unit, exact factors.
- 75 tools Utility Convert, count down, randomise.