Free network tools — no account needed
IP, DNS, TLS, and browser diagnostics — in one place.
Your IP address, your browser’s fingerprint, a site’s real certificate — the stuff that’s usually hidden in developer tools, laid out for you.
The rest of the toolbox
Everything else, organized by what it tells you.
IP Lookup
Look up any IPv4 or IPv6 address, not just your own.
DNS Resolver
Query A, MX, TXT, and other records for any domain.
CDN Detection
Find out which CDN is quietly serving a website.
Whois
Domain age, registrar, expiry, and nameservers.
Screenshot
An instant, full-page screenshot of any public website.
App Map
Crawl a site and see every page, form, and link as a map.
App Stack
Map a site's third-party libraries, analytics tags, and platforms.
TLS Scan
A+ to F grade — legacy protocols, weak ciphers, cert hygiene, HSTS preload.
Security Headers
Grade a site's CSP, HSTS, and other security headers, A+ to F.
My IP Address
The dedicated full-page version of the widget above.
Browser Fingerprint
The 40+ signals your browser quietly shares with sites.
User Agent Parser
Decode any User-Agent string into plain English.
JWT Validator
Decode and check a login token, entirely in your browser.
WBA Signature Validator
Verify an HTTP Message Signature (RFC 9421) against Ed25519 key material.
PAC Validator
Test a Proxy Auto-Config file against real URLs, sandboxed in your browser.
Cron Expression
Plain-English schedule preview and next run times.