SSL Check
Verify SSL/TLS certificate validity, expiry, issuer, and full chain for any domain.
The little padlock in your browser's address bar means the website is using SSL/TLS — an
encrypted connection. This tool inspects that certificate: which company issued it, what
hostnames it's valid for, and when it expires. Useful if you want to confirm a site is using
a real, trusted certificate before logging in or entering payment details.
Checking SSL certificate...
What the results mean
- Issuer — the company (Certificate Authority) that vouches the website is who it claims to be. Common ones: Let's Encrypt, DigiCert, Sectigo, Google Trust Services.
- Valid from / Valid to — the window during which the certificate is trusted. Most certificates today last 90 days to 1 year and are renewed automatically.
- Subject / SANs — the exact domain names the certificate covers. If the SANs don't include the domain in your browser, you'll see a warning.
When to use this
- Before logging in to a website you're unsure about — confirm the certificate is real and issued to the company you'd expect.
- If you see a security warning in your browser — this tool can tell you whether the warning is about an expired certificate, wrong hostname, or something else.
- If you run a website — quickly check that your certificate was installed correctly and hasn't expired.
What can go wrong
- Expired certificate — needs to be renewed. Browsers will warn or block the site.
- Wrong hostname — the certificate doesn't list the domain you typed. Most often a configuration mistake by the website owner.
- Untrusted issuer — the certificate was self-signed or issued by a CA your browser doesn't trust. Common in test/dev environments; suspicious on a real site.
- Mixed content — the certificate is valid but the page loads insecure resources (HTTP images, scripts) into the secure page. The address bar will show "not fully secure".