Utilities

SSL Certificate Checker

Check if a website's SSL certificate is valid, who issued it, and when it expires.

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Enter a domain to check its SSL certificate validity and details

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About this tool

How to use SSL Certificate Checker

1Enter a domain name (e.g. google.com) or paste the full URL
2Click 'Check SSL' — first analysis may take up to 60 seconds (cached results are instant)
3View SSL valid/invalid status, SSL Labs grade, certificate issuer, and expiry date
4Days remaining is highlighted in red if under 30 days

Frequently Asked Questions

What is an SSL certificate?

An SSL/TLS certificate enables the HTTPS padlock on websites. It encrypts data between your browser and the website, verifies the website's identity, and prevents man-in-the-middle attacks.

What do SSL Labs grades mean?

SSL Labs grades A+ to F rate the security configuration of HTTPS. A+ means perfect setup. A is excellent. B/C means some weak configurations. F means serious security issues or a failed certificate.

My certificate expires soon — what should I do?

Renew your SSL certificate before it expires. Most CAs send renewal reminders. If using Let's Encrypt, auto-renewal should be configured. A lapsed certificate will show browser security warnings.