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OneClickUse
Utilities Tool

SSL Certificate Checker

Inspect an HTTPS site's TLS certificate — issuer, validity, expiry, SAN list, cipher.

Privacy-first workflows
Fast and simple
100% Free, no signup
How it works

How to check an SSL certificate

STEP 01
Type the host (example.com) and optionally a non-default port.
STEP 02
Click Check SSL.
STEP 03
Review issuer, subject, expiry countdown, and the list of subject alternative names (SANs).
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FAQ

Common questions