About SSL Certificate Checker
The SSL certificate checker is a free online tool that shows you the SSL certificate details of any domain in seconds. Just type a domain name and the tool instantly displays the certificate validity dates, the number of days left before expiry, the serial number, the certificate authority and the IP address of the server.
This SSL checker tool reads the certificate information using public certificate transparency records and DNS lookups, all directly from your browser. Nothing is uploaded to our server and no signup is needed. It is perfect for webmasters who want a quick and simple way to check if a domain has a valid SSL certificate.
Features of SSL Certificate Checker
- Shows SSL certificate valid from and valid to dates
- Calculates the days left before the certificate expires
- Displays the certificate serial number and issuer (CA)
- Shows the resolved IP address of the domain
- Works with any domain, including subdomains
- Free, no signup, no data stored
How to Use SSL Certificate Checker
- Enter a domain name, for example google.com.
- Click Check Now.
- Wait a few seconds while the certificate details are fetched.
- Review the SSL details table shown below the form.
SSL Certificate Checker FAQ
Is the SSL certificate checker free?
Yes, completely free. There is no signup, no login and no limit on how many domains you can check.
How does this SSL checker work?
The tool reads the live SSL certificates of a domain from public certificate transparency records and looks up the IP address through Google's public DNS service. Everything runs directly in your browser.
Does it check subdomains too?
Yes. You can check any subdomain, for example mail.example.com, as long as it has its own SSL certificate.
Can I paste a full URL instead of a domain?
Yes. If you paste a full URL such as https://example.com/page, the tool automatically extracts the domain name and checks its certificate.
Is my domain sent anywhere?
Only the domain name you type is sent to the public certificate transparency and DNS services to perform the check. It is never saved or stored by this tool.