JWT Builder & Decoder

Creation et decodage de JSON Web Tokens (JWT).

Decoder Encoder

Token JWT

Header Rouge

{}

Payload Violet

{}

Signature Bleu

-

Status

-

Header

{ "alg": "HS256", "typ": "JWT" }

Payload

{ "sub": "1234567890", "name": "John Doe", "iat": 1516239022, "exp": 1893456000 }

Secret (pour signature HS256) Generer JWT

Token genere

Copier

Claims Standards (RFC 7519)

iss Issuer - Emetteur du token

sub Subject - Sujet du token

aud Audience - Destinataire

exp Expiration Time (Unix)

nbf Not Before (Unix)

iat Issued At (Unix)

jti JWT ID - Identifiant unique

Exemples

JWT Simple JWT Expire RS256

Structure JWT

xxxxx.yyyyy.zzzzz
  |      |     |
  |      |     +-- Signature
  |      +-------- Payload (Base64URL)
  +--------------- Header (Base64URL)

Verification en CLI

# Decoder sans verifier (jq)
echo "eyJhbG..." | cut -d. -f2 | base64 -d 2>/dev/null | jq

# Avec jwt-cli
jwt decode eyJhbGciOiJI...

# Python
python -c "import jwt; print(jwt.decode('token', options={'verify_signature': False}))"

# Verifier signature
jwt verify -S "secret" eyJhbGciOiJI...