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Token Signature Verifier

Verify JWT signatures using public keys or JWKS

JWT Token

Public Key

Supported Algorithms

RSA
RS256, RS384, RS512
RSA-PSS
PS256, PS384, PS512
ECDSA
ES256, ES384, ES512

Paste JWT and public key to verify automatically

Learn More

About Token Verification

  • •JWT signatures ensure tokens haven't been tampered with
  • •Asymmetric algorithms (RS256, ES256) use public/private key pairs
  • •JWKS (JSON Web Key Set) provides public keys for verification
  • •Always verify tokens server-side before trusting claims

Verification in IAM

  • •Token Validation – Verify IdP-issued tokens
  • •API Gateway – Validate access tokens
  • •Security Audit – Check signature algorithms
  • •Key Rotation – Test after cert renewal