CSR Decoder

Decode and inspect a CSR (PKCS#10) in your browser. No data leaves your device.

Decode a CSR

Paste CSR (PEM or Base64)

CSR Decoder FAQ

Common questions about decoding CSRs

What can I see in a decoded CSR?

A decoded CSR shows the subject (CN, O, OU, L, ST, C), public key information, signature algorithm, and the raw signature. This helps verify the request before submitting it to a Certificate Authority.

Is it safe to paste my CSR here?

Yes. Decoding is performed entirely in your browser. The CSR does not contain your private key and no data is sent to any server.