Question 1

Why do I need to extract the raw PEM certificate from a server?

Accepted Answer

Often, devops engineers or developers need a website's public certificate to debug local API requests, configure a client TrustStore, or verify if the currently deployed certificate is exactly the one they issued. This tool helps you strip out the raw text format from the live server with one click.

Question 2

Is it safe to paste my local PEM certificate for parsing?

Accepted Answer

A public key certificate (containing BEGIN CERTIFICATE) is public information by nature and does not contain your Private Key. Pasting it here poses absolutely no security threat to your website. However, please NEVER paste your private key (BEGIN PRIVATE KEY) into any online tool!

Question 3

Why does the browser say the certificate is valid, but the days remaining here are different?

Accepted Answer

Browsers sometimes cache certificate states. Our tool performs a real-time, physical TLS handshake to the target server's port 443 to retrieve the actual certificate file being served right at this moment. Therefore, our results represent the most accurate and up-to-date deployment status.

Question 4

What are Subject Alternative Names (SANs)?

Accepted Answer

SANs allow a single SSL certificate to secure multiple domains or subdomains. If you are using a wildcard certificate (e.g. *.example.com) or a multi-domain certificate, this field will list all domains legally protected by this certificate.

SSL Checker

Frequently Asked Questions (FAQ)