Free Tools

Website & Server Tools

Free tools to check SSL certificates, domain expiration, API health, and server latency. 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
Use tool

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
Use tool

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
Use tool

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
Use tool

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 with 1-minute intervals. Free for unlimited websites.

Need Automated Monitoring?

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

Start Free Monitoring
Start Monitoring