JWT Debugger

Decode JWT header and payload, inspect claims, and verify HMAC signatures.

Privacy-first workflows

Fast and simple

100% Free, no signup

Encoded JWT

HMAC secret (HS256 / HS384 / HS512)

Decoded Header

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

Decoded Payload

{
  "sub": "1234567890",
  "name": "John Doe",
  "admin": true,
  "iat": 1516239022,
  "exp": 1924999999
}

Registered claims

Algorithm: HS256

Issued at: 1/18/2018, 1:30:22 AM (2018-01-18T01:30:22.000Z)

Not before: —

Expires: 1/1/2031, 2:13:19 AM (2031-01-01T02:13:19.000Z)

How it works

How to debug a JWT

STEP 01

Paste the encoded JWT token.

STEP 02

Inspect the decoded header, payload, and registered claims.

STEP 03

Enter the HMAC secret if you need to verify HS signatures.

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