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PingThat Guides Browser-side · queries to public APIs

23 Network Tools

Ping, check, analyze

Network diagnostics and developer tools. Some run entirely in your browser (subnet math, JWT decoding, password strength); others query public APIs (Cloudflare DoH, RDAP, certificate logs) when they need real internet data. No accounts. See /methodology/ for the per-tool breakdown.

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Security

6
SSL Checker Check SSL/TLS certificate status, HSTS, and certificate transparency logs HTTP Headers Inspect HTTP response headers and security header analysis WHOIS Lookup Look up domain registration details, registrar, and nameservers via RDAP Redirect Checker Trace the full redirect chain of any URL with status codes CAA Checker Check which Certificate Authorities are authorized to issue certificates for a domain DNSSEC Check Validate DNSSEC signing status, DS chain of trust, and resolver validation for a domain

Speed & Uptime

3
Website Status Check website uptime, response time, and server status Is It Down? Check if a website is down for everyone or just you Site Speed Check Core Web Vitals (LCP, INP, CLS, FCP, TTFB) from real Chrome user data

Calculators

5
Subnet Calculator Calculate network address, broadcast, host range from CIDR notation IP Address Converter Convert IP addresses between decimal, binary, hexadecimal, and octal Password Strength Checker Analyze password entropy, crack time estimation, and strength rating JWT Decoder Decode and inspect JSON Web Tokens — header, payload, and signature URL Parser Parse and break down URLs into protocol, host, path, query params, and hash

More tools coming soon

DNS lookup, port scanner, SSL checker, HTTP headers, and more.