SEO & Web ToolsFree

SSL Certificate Checker

Check any domain's SSL/TLS certificate details — expiry date, certificate issuer, subject, Subject Alternative Names (SANs), and whether the certificate is currently valid. Get an alert if the certificate is expired or expiring within 30 days. No signup required.

Updated June 2026

  1. 1Enter the domain name
  2. 2Run the check
  3. 3Review the certificate details

🌐 API Integration Required

This tool needs a backend API to check external URLs. Options:

  • Use a serverless function (Next.js API route)
  • Integrate with RapidAPI URL checker APIs
  • Use PageSpeed Insights API (for speed checker)

How to use SSL Certificate Checker

  1. 1

    Enter the domain name

    Type the domain you want to inspect, without http:// or https://.

  2. 2

    Run the check

    Click 'Check' to fetch the site's SSL/TLS certificate.

  3. 3

    Review the certificate details

    See the issuer, expiration date, and overall validity status.

Frequently asked questions

Everything you need to know about ssl certificate checker.

Expiry date, days until expiry (or days since expiry if expired), certificate issuer (CA name), domain subject, Subject Alternative Names (SANs), and whether the certificate is currently valid.

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