How do I check when an SSL certificate expires?

Enter the domain on this page. We pull the most recent valid certificate from the Certificate Transparency logs and show its “Not After” date plus the days remaining until expiry.

What is Certificate Transparency (CT)?

CT is a public, append-only log of every TLS certificate issued by participating Certificate Authorities. It exists so site operators can detect mis-issued certificates for their domains. This tool reads those logs via crt.sh.

Yes — completely free, no signup, no rate limit for normal use. It uses public Certificate Transparency logs and a live HTTPS reachability check.

SSL / TLS

Certificate check

Enter a domain. We pull its recent Certificate Transparency log entries from crt.sh, identify the currently-valid leaf certificate, and verify the live HTTPS endpoint actually serves a working chain. No signup, no rate limits for normal use.

In one line: MyIPSpeed SSL Checker fetches the live TLS certificate chain and all Certificate Transparency log entries for any domain via crt.sh, returning issuer, validity dates, SANs, key algorithm, and a deployment grade in under 5 seconds.

About SSL/TLS certificates

An SSL/TLS certificate binds a public key to a domain name and is signed by a Certificate Authority that browsers already trust. Modern usage is "TLS" rather than "SSL" — SSL was deprecated in 2015, but the colloquial name stuck.

What this tool does

We fetch the live TLS certificate for the domain you enter, then query crt.sh — a public mirror of Certificate Transparency logs — to surface every certificate ever issued for that domain (and subdomains). You get issuer, validity dates, Subject Alternative Names, key algorithm, and the full historical record in under 5 seconds.

Certificate Transparency logs

Since 2018, all CAs trusted by Chrome (and most other browsers) must submit issued certificates to public CT logs. crt.sh aggregates these logs so anyone can search them. This is useful for detecting unauthorized certs issued for your domain, mapping a target subdomain footprint, and verifying CA behavior.

Common reasons to check a cert

Verify a renewal landed before the old cert expires. Check whether a partner is using a valid cert before integrating. Audit for misissued certs against your domain (CT log search). Confirm the expected SANs are present after a wildcard or multi-domain renewal.

When to use SSL Labs instead

For a deeper protocol or cipher audit — checking TLS 1.0/1.1/1.2/1.3 support, individual cipher suite vulnerability, known issues like Heartbleed or POODLE — use Qualys SSL Labs (60-120s scan, A+ to F grade, public scan history). Our tool is built for speed and CT history; SSL Labs is built for depth.