Blue Team

JWT SIGNATURE VALIDATOR

Inspect claims, decode structures, verify encryption algorithms, and ensure the cryptographic signature integrity of JSON Web Tokens.

Token Parameters

JWT Token

Signature Verification Algorithm

For RS* / ES* cryptographic checks, choose the correct algorithm and paste public PEM key material.

HMAC Secret Key / Shared Password

Verifies cryptographic signatures against selected algorithm keys (HS*, RS*, ES*).
Audits token expiration (exp), activation time (nbf), and audience validation parameters.
Detects common structural algorithm attacks (e.g. none algorithm signatures).