Free Tools

Website & Server Tools

Free tools to check SSL certificates, domain expiration, DNS records, API health, server latency, redirect chains, and website uptime. No signup required.

SSL Certificate Checker

Check any website's SSL certificate instantly. See expiration dates, issuer details, TLS version, certificate chain, and security grade.

  • Certificate validity & expiration
  • TLS protocol version
  • Issuer & subject details
  • Security grade breakdown
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Domain Expiration Checker

Look up any domain's registration details. See expiry date, registrar, nameservers, and WHOIS data — all from RDAP and WHOIS databases.

  • Domain expiry date & countdown
  • Registrar & nameservers
  • WHOIS creation & update dates
  • Registry status codes
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DNS Lookup Tool

Look up all DNS records for any domain. Check A, AAAA, MX, NS, TXT, SOA, CAA, and CNAME records with email security analysis and a DNS health grade.

  • All record types (A, AAAA, MX, NS, TXT, SOA, CAA)
  • Email security analysis (SPF & DMARC)
  • DNS health grade
  • TTL values & SOA details
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API Status Checker

Test any API endpoint's health. Check response time, HTTP status, security headers, CORS configuration, and redirect chains in real time.

  • Response time & status code
  • Security headers audit
  • CORS configuration check
  • Redirect chain analysis
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Ping Test

Measure latency, packet loss, and jitter to any server or website. TCP-based ping from your browser — no command line needed.

  • Latency (min / avg / max)
  • Packet loss percentage
  • Jitter measurement
  • Multiple ping rounds
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Redirect Checker

Trace the full HTTP redirect chain for any URL. See every hop, status code, Location header, and response time — find broken or unnecessary redirects.

  • Full redirect chain visualization
  • Status codes for every hop
  • Response time per redirect
  • Response headers inspection
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Uptime Checker

Comprehensive website health check. Analyzes DNS, SSL, redirects, response time, security headers, and content health with detailed grades.

  • DNS, SSL & redirect analysis
  • Security headers audit (HSTS, CSP)
  • Performance metrics (TTFB, compression)
  • Overall health score (A+ to F)
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Why Use These Tools?

Instant Results

Get detailed results in seconds. No account, no email, no paywall. Just enter a domain and go.

Developer Friendly

Built for developers and sysadmins. Copy results, download reports, and share via URL parameters.

Upgrade to Monitoring

Need continuous checks? exit1.dev monitors your sites 24/7. 10 free monitors with 5-minute checks. Unlimited with Nano.

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Stop running manual checks. exit1.dev monitors your websites, SSL certificates, and API endpoints automatically — with instant alerts when something goes wrong.

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