SSL / TLS Checker
The SSL / TLS Checker verifies whether a website has a valid SSL certificate and tells you how many days remain before it expires.
Confirm a site is secure
An SSL/TLS certificate is what enables the padlock and HTTPS, encrypting traffic between visitors and a site. Enter a domain and the checker reports whether its certificate is valid, who issued it, and the expiry date - so you can confirm a site is properly secured or catch a certificate about to lapse.
Why expiry dates matter
An expired certificate triggers alarming browser warnings that scare away visitors and break trust. Site owners use this to monitor renewal deadlines; visitors use it to sanity-check a site before entering data. To inspect a domain's other records, pair it with the DNS Lookup.
Frequently Asked Questions
What does an SSL certificate do?
It encrypts the connection between a browser and a website (enabling HTTPS and the padlock) and verifies the site's identity.
What happens when a certificate expires?
Browsers show a security warning that blocks or discourages visitors, so it is important to renew before the expiry date.
What details does the checker show?
Whether the certificate is valid, the issuer, and the number of days until it expires.
Can I check any website?
Yes. Enter any domain to see its certificate status and expiry.
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