SSL certificate checker
Inspect a website's TLS certificate: issuer, validity, SANs and days left.
Runs on our server
About this tool
Check whether a website’s SSL/TLS certificate is valid, who issued it, when it expires and which domains it covers.
How to use it
- 1 Enter a domain such as example.com.
- 2 Select Check.
- 3 Review the validity and expiry.
Questions
How often do certificates expire?
Most certificates last 90 days (Let’s Encrypt) to a year and must be renewed before they expire.
What does the server do?
Our server connects to the address you enter to run the check. It only connects to public websites, and we don’t keep a log of your lookups.
Is this tool free?
Yes. It’s free to use with no sign-up and no limits for normal use.
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