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.
A free set of SSL and domain tools for checking any public website. Look up a certificate's plain-English validity and expiry date, see when a domain-name registration lapses, and scan a whole list at once. Every tool is free, with no signup.
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
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
Common questions
- Are these SSL tools really free?
- Yes. Every tool here is completely free with no signup and no card. If you'd like us to keep watching your certificates and domains for you, a free SSLCanary account covers 5 domains.
- What's the difference between SSL expiry and domain expiry?
- SSL expiry is when your certificate — what makes a site load over https — runs out, usually every few months. Domain expiry is when your registration of the name lapses, usually yearly. Both can lapse independently.
- Do I need to install anything?
- No. Every check runs from our servers over the public internet, so there's nothing to download or install. Just enter a hostname and get a plain-English answer in one click.
- Can I check many domains at once?
- Yes. Use the bulk checker to scan a whole list of hostnames in one go. To keep watching your entire portfolio and get alerts before anything lapses, monitor it with SSLCanary.
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.
Free for 5 domains. No card to start.