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PingThatGuidesBrowser-side · queries to public APIs

24 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 CheckerCheck SSL/TLS certificate status, HSTS, and certificate transparency logsHTTP HeadersInspect HTTP response headers and security header analysisWHOIS LookupLook up domain registration details, registrar, and nameservers via RDAPRedirect CheckerTrace the full redirect chain of any URL with status codesCAA CheckerCheck which Certificate Authorities are authorized to issue certificates for a domainDNSSEC CheckValidate DNSSEC signing status, DS chain of trust, and resolver validation for a domain

Speed & Uptime

4
Website StatusCheck website uptime, response time, and server statusIs It Down?Check if a website is down for everyone or just youSite SpeedCheck Core Web Vitals (LCP, INP, CLS, FCP, TTFB) from real Chrome user dataHTTP PingMeasure HTTP(S) response time from Cloudflare's global edge — latency, jitter, and reachability

Calculators

5
Subnet CalculatorCalculate network address, broadcast, host range from CIDR notationIP Address ConverterConvert IP addresses between decimal, binary, hexadecimal, and octalPassword Strength CheckerAnalyze password entropy, crack time estimation, and strength ratingJWT DecoderDecode and inspect JSON Web Tokens — header, payload, and signatureURL ParserParse 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.

What Is My IP
Browser Privacy Check
WebRTC Leak Test
DNS Lookup
Email Auth
Port Scanner
IPv6 Readiness
Reverse DNS
Resolver Compare
SSL Checker
HTTP Headers
WHOIS Lookup
Redirect Checker
CAA Checker
DNSSEC Check
Website Status
Is It Down?
Site Speed
HTTP Ping
Subnet Calculator
IP Address Converter
Password Strength Checker
JWT Decoder
URL Parser