CSR Decoder
Paste a PEM CSR and decode its subject, public key algorithm, and signature algorithm.
$PEM CSR
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FAQ
- What is a CSR?
- A Certificate Signing Request (PKCS#10) is sent to a CA to request a signed certificate. It contains the subject fields and the applicant's public key.
- How do I generate a CSR?
- Use the CSR Generator tool on this site, or run: openssl req -new -newkey rsa:2048 -nodes -keyout key.pem -out csr.pem
Decode a Certificate Signing Request (CSR) in PEM format. Parses the ASN.1 DER structure to extract the subject fields (CN, O, OU, C, ST, L, email), public key algorithm and size, and signature algorithm. Useful for verifying CSR contents before submitting to a certificate authority.