Security Tools

Certificate Lookup

↑ Enter a hostname and (optional) port ↑

Issued To:
Issued By:
Valid From:
Valid To:
Serial Number:

About the Security Tools

Use the Certificate Lookup to retrieve the TLS certificate or SSL certificate for a site.

The certificate is a file on a web server that is presented to clients, e.g. browsers, and used to for secure and encrypted communications.

This tool also has an associated API.