Plexto

SSL Certificate Checker

NEW

Check a domain's SSL certificate expiry, issuer, and coverage.

Ad Slot
Ad Slot

Frequently asked questions

What happens if my SSL certificate expires?

Browsers will show visitors a prominent security warning and block easy access to your site — most people won't click through it. It's worth checking expiry well before the deadline, especially since some certificate authorities only issue short-lived certificates.

What does "Covers" mean in the results?

It lists every domain and subdomain the certificate is valid for (its Subject Alternative Names) — a certificate for example.com won't necessarily cover www.example.com or api.example.com unless they're explicitly listed.

Is checking someone else's domain's certificate a problem?

No — certificate details are public information, visible to anyone who connects to the site over HTTPS. This tool just automates what your browser already does on every visit.

Ad Slot

Related tools

Password Generator

Generate strong, random passwords with a strength meter.

Password Strength Checker

Check and score the strength of any password.

QR Code Generator

Generate QR codes for any URL, text, or contact info.

My IP Address

See your current public IP address and location info.

Ad Slot

We use cookies for analytics and to show ads that keep this site free. No personal data is sold.