Free tool
Instant SSL checker and expiry alert
Confirm your certificate is valid, correctly installed and enforced — and find out how many days you have before it expires on your visitors.
How it works
Enter your domain
We connect over HTTPS exactly as a browser would.
Certificate and transport checked
Issuer, coverage, expiry, HTTP redirect behaviour and HSTS enforcement.
Act before it expires
Your PDF flags renewal deadlines and the transport headers you should add.
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Open toolQuestions about this tool
What does the SSL checker test?
Whether your site is reachable over HTTPS, whether plain HTTP is redirected, whether HSTS is enforced, and the issuer, coverage and expiry of your current certificate from public certificate transparency logs.
Why does certificate expiry matter so much?
An expired certificate shows every visitor a full-page browser warning. Most people leave immediately, and search engines notice the drop in engagement.
What is HSTS?
A response header telling browsers to only ever connect to your domain over HTTPS. It closes the small window where a first visit could be intercepted.
Do you include SSL with hosting?
Yes — free auto-renewing SSL is included on every hosting plan, and we also sell DV, OV, EV and wildcard certificates for higher assurance requirements.
My certificate is valid but the score is low — why?
A valid certificate is only part of it. Missing HTTP-to-HTTPS redirects or absent HSTS still leave visitors exposed, so both reduce the score.