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RS256 Key Pair Generator

Generate RSA key pairs for RS256 JWT signing and verification. Create 2048 or 4096-bit asymmetric key pairs.

Key Generator

RSA-SHA256 Asymmetric Keys

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Click Generate Keys to create a new RSA key pair

RS256 Algorithm

lockPrivate Key
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Sign
keyPublic Key
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Verify
AlgorithmRSASSA-PKCS1-v1_5 + SHA-256
Key TypeAsymmetric (public/private pair)
FormatPEM (PKCS#8 / SPKI)

About RS256 Key Pairs

RS256 uses asymmetric RSA keys with SHA-256 hashing. The private key signs tokens while the public key verifies them. This is ideal for distributed systems where the signer and verifier are different applications.

  • 2048-bit keys are standard; 4096-bit for higher security requirements
  • Private key must be kept secret and secure
  • Public key can be freely distributed for verification
  • Keys are generated using Web Crypto API in your browser
  • No keys are transmitted or stored on any server