SSL Checker
Issuer, expiry and domains on a certificate.
About the SSL Checker
An expired or misconfigured SSL certificate shows visitors a scary warning and hurts search rankings. Enter a domain to see whether its certificate is trusted, who issued it, which domains it covers, the TLS version and how many days remain before it expires.
When to use it
- Checking a website’s certificate before it expires
- Verifying a new SSL installation
- Confirming that www and non-www versions are covered
- Troubleshooting “Your connection is not private” errors
Tips for the best results
- Free certificates (e.g. Let’s Encrypt) last 90 days and should renew automatically
- An incomplete chain can fail on some phones even if desktop browsers work
- Set a reminder for 2–3 weeks before expiry
How to use the SSL Checker
- Enter a domain or press the button in the SSL Checker.
- Our server runs the check and returns the result in seconds.
- Run it again any time to compare.
SSL Checker FAQ
Is the SSL Checker free?
Yes. The SSL Checker is completely free with no sign-up, no daily limit and no watermark.
Is it safe to use the SSL Checker with private files?
The SSL Checker sends only the domain or address you enter to our server so it can run the check. We do not store lookups.
Does the SSL Checker work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.