Free SSL checker · Instant · No signup

SSL Checker

Check your SSL/TLS certificate in seconds. Domain Doctor reads your live certificate, checks expiry, hostname match and issuer, and flags weak protocols.

19 checks per scan Results in seconds Free, no signup

The tool

What the SSL Checker checks

Your SSL/TLS certificate is what turns the padlock on. If it expires, does not match your hostname, or is served without its full chain, browsers show scary warnings and visitors leave.

Domain Doctor connects to your site over TLS, reads the certificate, and reports the days until expiry, whether the hostname matches the certificate’s names, the issuer, and whether outdated protocols like TLS 1.0/1.1 are still offered. We warn well before expiry so you are never caught out.

How it works

Check your domain in three steps

1Enter your domainType any domain into the box above and start the free scan. No signup, no software.

2We inspect it liveDomain Doctor connects over TLS and inspects your certificate, in real time from our servers.

3Get a clear verdictYou get a plain-language result, the exact records we found, and a concrete fix if anything is wrong.

What to watch for

Common SSL Checker problems

Certificate expired or expiring within 30 days
Hostname not covered by the certificate’s CN/SAN
Incomplete chain (missing intermediate certificate)
Self-signed or untrusted issuer
Server still offering TLS 1.0 / 1.1

VASTROX Hosting

Never worry about SSL again

On VASTROX hosting your SSL is issued, chained and auto-renewed, so you get no expiries and no browser warnings.

Free auto-renewing SSL certificates
Full certificate chain served correctly
Modern TLS only, weak protocols disabled

Sort my SSL Explore VASTROX Hosting

Hosting, VPS, business email and game servers. Free migration. Real support.

Questions

Frequently asked

How long before expiry should I renew?

Renew at least 15 to 30 days before expiry. Automated issuance (like Let’s Encrypt) renews around 30 days out so there is always a buffer.

Why does my certificate work in one browser but not another?

Usually a missing intermediate certificate. Some browsers cache the intermediate and appear fine while others fail. Always serve the full chain.