About This Tool
Parse and decode PEM-encoded X.509 SSL/TLS certificates to view their details including subject, issuer, validity period, and extensions.
How to Use
- Paste a PEM-encoded certificate (starts with —–BEGIN CERTIFICATE—–)
- Click Decode to parse the certificate
- View the decoded fields and details
FAQ
Where do I get the PEM certificate?
You can export it from your browser, download from your server, or get it using: openssl s_client -connect example.com:443