JWT Inspector & Verifier
SubtleCrypto Verifier
Inspect JSON Web Tokens, evaluate claims, track expiration validity, and verify HMAC signatures locally via Web Crypto Subtle without transmitting credentials.
Client-Side Cryptography: JWTs and secrets never leave your browser
HMAC Signature Verification
Decoded (Signature Unverified)
Active / Valid ExpHeader:
{
"alg": "HS256",
"typ": "JWT"
}Payload Claims:
{
"sub": "usr-9982",
"name": "Alex Chen",
"role": "admin",
"iss": "auth.platform.io",
"exp": 1999999999,
"iat": 1680000000
}Comment inspecter un jeton JWT
- 1Collez votre jeton JWT.
- 2Vérifiez la signature avec votre clé secrète.
Frequently Asked Questions
La clé secrète est-elle protégée ?
Oui, elle ne quitte jamais votre navigateur.