Question 1

What is an X.509 certificate decoder?

Accepted Answer

It displays the details inside SSL/TLS certificates.

Question 2

How do I decode a certificate?

Accepted Answer

Paste PEM/CRT/CER content and view details instantly.

Question 3

Can I see expiration and issuer info?

Accepted Answer

Yes. Key validity details appear clearly.

Question 4

Can I view Subject Alternative Names (SAN)?

Accepted Answer

Yes. All listed hostnames are shown.

Question 5

Can I check the fingerprint?

Accepted Answer

Yes. SHA fingerprints are included for verification.

Question 6

Can I inspect chain information?

Accepted Answer

Yes. Certificate chain elements display when included.

Question 7

Can I decode CSR requests?

Accepted Answer

Yes. Certificate request info is supported.

Question 8

Can I copy decoded info?

Accepted Answer

Yes. One click to export data.

SSL Certificate Decoder Tool

Frequently Asked Questions