Generate JWS key and Sign Payload

This tool will help you to signed the payload and generate the serialiazed JWS Key using Algorithms HMAC,RSA and EC

JWS Algo

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Any private key value that you enter or we generate is not stored on this site, this tool is provided via an HTTPS URL to ensure that private keys cannot be stolen, for extra security run this software on your network, no cloud dependency


JSON Web Signature (JWS) represents content secured with digital signatures or Message Authentication Codes (MACs) using JSON based data structures


  • HS256 - HMAC with SHA-256, requires 256+ bit secret
  • HS384 - HMAC with SHA-384, requires 384+ bit secret
  • HS512 - HMAC with SHA-512, requires 512+ bit secret


  • RS256 - RSA PKCS#1 signature with SHA-256
  • RS384 - RSA PKCS#1 signature with SHA-384
  • RS512 - RSA PKCS#1 signature with SHA-512
  • PS256 - RSA PSS signature with SHA-256
  • PS384 - RSA PSS signature with SHA-384
  • PS512 - RSA PSS signature with SHA-512

JWS Elliptic Curve (EC) Algo

  • ES256 - EC P-256 DSA with SHA-256
  • ES384 - EC P-384 DSA with SHA-384
  • ES512 - EC P-521 DSA with SHA-512