No signup, no card, no catch

Free SSL & domain tools

Check a certificate, find out when a domain expires, or scan a whole list at once. Plain-English answers in one click. Then let us watch them all for you.

Single-domain checks

Free SSL Certificate Checker

Is this site's certificate valid, and when does it expire?

SSL Expiry Checker

How many days until this certificate needs renewing?

Domain Expiry Checker

When does this domain's registration lapse?

Why is my SSL not working?

A plain diagnosis when a browser says "not secure".

SSL Chain & Installation Checker

Is the certificate installed correctly, with the full chain?

Bulk & portfolio

Most used

Bulk SSL & domain checker

Paste up to 20 domains and check SSL and registration for all of them at once.

Portfolio scorecard

A shareable health grade for a whole list. Something to show a client.

Utilities

Expiry calendar (.ics)

Download expiry reminders straight into your own calendar.

"SSL monitored" badge

A small badge for your site's footer. Copy one line to embed it.

Watch all of them automatically.

These tools check one thing, once. SSLCanary watches your whole list every day and warns you in plain language before anything lapses.

Start free

Free for 5 domains. No card to start.