What key types are supported?

RSA private keys (PKCS#8 or traditional), RSA public keys (SPKI), EC private keys, and EC public keys. The type is detected from the PEM header.

Is my private key safe?

Yes. All parsing is done in the browser. Nothing is transmitted.

PEM Key Parser

Paste a PEM private or public key to detect its type, algorithm, and key size.

$PEM Key

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Paste a PEM CSR and decode its subject, public key algorithm, and signature algorithm.

FAQ

What key types are supported?: RSA private keys (PKCS#8 or traditional), RSA public keys (SPKI), EC private keys, and EC public keys. The type is detected from the PEM header.
Is my private key safe?: Yes. All parsing is done in the browser. Nothing is transmitted.

Paste any PEM-encoded key — RSA private, RSA public, EC private, or EC public. The tool detects the key type from the header, then performs basic ASN.1/DER parsing to identify the algorithm OID and key size in bits. For RSA keys the modulus length is shown. Useful for quickly auditing key files.