SSL / TLS Checker
Inspect a site's TLS certificate, expiry, issuer and negotiated protocol, with a full report.
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About this tool
Inspect a site's TLS certificate, expiry, issuer and negotiated protocol, with a full report.
XGM connects from its server: one verified handshake for the certificate, one handshake per protocol version (TLS 1.0 to 1.3), handshakes that offer only weak cipher groups, a TLS 1.2 handshake that asks for a stapled OCSP response, and an HTTPS request for the HSTS header. The HSTS preload status comes from hstspreload.org. The grade follows SSL Labs-style caps: untrusted or expired certificate F, 3DES or RC4 C, TLS 1.0/1.1 B, no TLS 1.3 A-, HSTS of six months or more on an A lifts it to A+.
How to use it
- Open the TLS Checker tool.
- Enter the public domain, hostname or IP address you want to check.
- Run the check; XGM queries it from its server and lists the findings.
- Copy the output only after checking it looks correct.
- Use related XGM tools if you need a broader diagnostic view.
FAQ
Is the TLS Checker free to use?
Yes. The SSL checker is free and works without creating an account.
Does XGM store my input for TLS Checker?
Browser-side utilities process input locally. Server checks send only the domain, host or IP you enter to the XGM API and do not store it.
Can I use TLS Checker for production checks?
Yes, use it for quick validation and troubleshooting. For critical changes, confirm the result with your official provider, logs, monitoring or security stack.
What should I do after using the SSL checker?
Compare the result with related signals, save useful evidence and follow the linked XGM guide or related tools if you need a wider check.
Read the full SSL / TLS Checker guide