SSL Certificate Checker
Inspect the live certificate a domain serves, with expiry and chain details.
Enter a domain to inspect the live certificate its server presents, including expiry, issuer, chain and trust.
About the SSL Certificate Checker
Check the certificate a public website actually presents: common name and every covered alternative name, issuer, validity dates and days left before expiry, key type and size, signature algorithm, revocation status, SHA-1 and SHA-256 fingerprints, and the full chain up to the trusted root. Each IP address behind the domain gets its own trust grade.
Examples
Check a site
example.comOutput
Valid until 2026-12-01, 76 days left, issuer Let's EncryptKeyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
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Version 1.0.0 · Updated 2026-09-16 · Runs entirely in your browser