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    CSR Decoder & Inspector

    100% Client-Side

    Paste a PEM-encoded Certificate Signing Request (CSR / PKCS#10) to decode and inspect all fields: subject, key algorithm & size, signature algorithm, SANs, extensions, and security grade. Everything runs in your browser — no data leaves your machine.

    CSR Input

    Paste a PEM CSR or upload a .csr / .pem file

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