JWT Token Decoder

Inspect JWT claims, issued-at dates, expiration timestamps, and algorithms in-browser without sending tokens to any remote server.

Your inputs are calculated locally in your browser. No personal data is sent across the network.

Encoded JWT Token

Header (Algorithm & Token Type)

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

Payload (Data & Claims)Active

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

Expires at: 2030-01-01T00:00:00.000Z

How to use this tool

1Step 1

Paste your JWT token into the box.

2Step 2

Inspect decoded Header and Payload JSON blocks and check expiration status.

Is it safe to paste sensitive tokens?

Yes, decoding happens 100% locally in your browser. The token is never transmitted over the network.

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