JWT Debugger

Understand your authentication tokens better. Decode JWTs locally to see their Header, Payload, and Signature without ever sending them to a server.

AWAITING INPUT

Encoded Token

Paste Token to Begin

Securely decode your authentication claims locally in your browser workspace.

INSPECTION

  • 1

    Paste your JWT into the input field.

  • 2

    The Header and Payload will be automatically decoded.

  • 3

    Check the validation status for structure and expiration.

  • 4

    Optionally provide a secret to verify the signature.

Capabilities

Automatic decoding
Expiration check
Header/Payload breakdown
Client-side verification

Privacy Policy

Tokens are decoded using native browser APIs. No external calls or logging occur. Zero data footprint.