SSL & CSR decoder
Paste a PEM-encoded certificate or a certificate signing request below. Never paste a private key here or anywhere else.
What is SSL & CSR decoder?
Before submitting a CSR to a certificate authority, or receiving a certificate back, it's worth double-checking exactly what information it actually contains — the domain names, organization, and key details it will bind together.
How to use it
Paste a PEM certificate or CSR to see every field decoded — subject, issuer (for certificates), validity dates, public key details, and all covered domain names.
Example
A CSR for example.com decodes to show Common Name: example.com,
Public key: RSA / 2048 bits.