Free SEO tool
SSL certificate checker
Check HTTPS, certificate validity, issuer and SAN domains for a public website.
Before you start
One check, three clear steps
Run the check
Check SSL certificate
Use public URLs only. Do not submit private admin pages, tokens or internal services.
Your result will appear here
You will see TLS connection details, certificate dates, issuer and covered domains.
How to use the result
Follow the check in order
- Enter the HTTPS website address.
- Check expiry date and whether the hostname is covered.
- Renew or replace the certificate before it expires.
Next checks
Continue with a related tool
HTTP headers checker
Inspect HTTP status, caching, security headers and the final response URL.
Open tool →Next checkRedirect checker for 301 and 302
Follow a URL redirect chain, inspect every HTTP status and confirm the final destination.
Open tool →Next checkFree SEO audit for a web page
Check title, meta description, H1, canonical, robots meta, Open Graph, links and HTTP status for one public URL.
Open tool →FAQ
Common questions
What should I enter?
Use a public production URL or the exact text requested by the form. Do not enter private admin pages, tokens or internal addresses.
Is every recommendation critical?
No. Fix issues that block crawling, indexing, page understanding or the user path first. Treat the rest as improvements.
How do I confirm the fix?
Run the same check again for the same URL after publishing the change.