TLS & certificates

Certificate signed with SHA-256 or better

Certificate validity and trust, key strength and protocol versions.

Why it matters

Certificates signed with SHA-1 or MD5 can be forged and are rejected by modern browsers.

How to fix it

Quick fix · under 1 hour

Reissue the certificate with a SHA-256 signature.

Test this now, free: SSL certificate checker - no sign-up.

How we test it

The check runs from the public internet as part of every scan, read-only and without touching your data. If it fails, your report shows the evidence that proves it - the record, header, file or banner we observed - together with the fix above, tailored to the issue we found.

Does your domain pass this check?

Run all 97 checks in about a minute. Your first scan is free, with the complete fix for your most urgent finding.

Scan your domain free