# Network Tools

17 Network Tools on FindUtils.

Online network tools -- DNS lookup, IP checker, speed test, SSL validator, WHOIS, and subnet calculator. Diagnose and test your network instantly. No install.

FindUtils network tools cover DNS, IP, SSL, WHOIS, subnet, and HTTP header work. Look up DNS records (A, AAAA, CNAME, MX, TXT, NS, SOA), check any IP address with geolocation data, test your connection speed, verify SSL certificate validity and expiry dates, query WHOIS registration data, calculate IPv4 and IPv6 subnets, and grade HTTP security headers against OWASP guidance. The reference tools, such as the subnet calculator, HTTP status lookup, MIME type finder, port reference, and URL encoder, run in your browser and make no network request. The lookup tools send the domain, IP, or URL you enter to the named resolver or service, and each page states what leaves your device. There is nothing to install, and the tools work on any device. FindUtils.com is not the GNU findutils package.

- [SSL Certificate Checker](https://findutils.com/network/ssl-certificate-checker/)
- [Security Headers Analyzer](https://findutils.com/network/security-headers-analyzer/)
- [IP Blacklist Checker](https://findutils.com/network/ip-blacklist-checker/)
- [Email Header Analyzer](https://findutils.com/network/email-header-analyzer/)
- [DNS & WebRTC Leak Test](https://findutils.com/network/dns-leak-test/)
- [DNS Security Scanner](https://findutils.com/network/dns-security-scanner/)
- [Subnet Calculator](https://findutils.com/network/subnet-calculator/)
- [WHOIS Lookup](https://findutils.com/network/whois-lookup/)
- [Port Reference Guide](https://findutils.com/network/port-reference-guide/)
- [Bot Crawl Checker](https://findutils.com/network/bot-crawl-checker/)
- [IP Address Lookup](https://findutils.com/network/ip-address-lookup/)
- [Internet Speed Test](https://findutils.com/network/internet-speed-test/)
- [DNS Lookup](https://findutils.com/network/dns-lookup/)
- [URL Encoder/Decoder](https://findutils.com/network/url-encoder-decoder/)
- [Screen Resolution Detector](https://findutils.com/network/screen-resolution-detector/)
- [HTTP Status Code Lookup](https://findutils.com/network/http-status-code-lookup/)
- [MIME Type Finder](https://findutils.com/network/mime-type-finder/)

## Also on FindUtils

These do related work and live at another address on FindUtils, so they are not counted above.

- [What Is My IP](https://findutils.com/what-is-my-ip/)