CSR Decoder
Decode Certificate Signing Requests (CSRs) used in the SSL/TLS certificate issuance process.
Input
Paste your CSR here to decode it.
Output
Decoded CSR will appear here...
Using CSR Decoder for open banking
Read certificate signing request subjects and public-key details before submitting a bank API certificate request.
Sandbox example and expected result
Generate a test CSR with CN=sandbox.example.com and inspect the subject and key size before issuing a certificate.
Limitations and troubleshooting
A CSR is a request, not an issued certificate or evidence that a bank trusts the key. Malformed PEM or unsupported encodings can fail to parse.
Where your input is processed
CSR decoding runs in your browser. A private key is not needed. Use synthetic test data.
Maintained by OpenFinanceTools. Guidance updated 23 October 2026. Testing and editorial approach