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How to Decode JWTs

Quickly decode JSON Web Tokens to view their header and payload information securely.

Open Decode JWTs

1Step-by-Step Guide

1

Paste Your JWT

Copy your encoded JSON Web Token (which usually starts with 'eyJ') and paste it into the input area.

2

Instant Decoding

The tool immediately decodes the base64url encoded parts of the token.

3

View Header and Payload

You can clearly read the algorithm details in the Header section, and all the user data (claims) in the Payload section.

Frequently Asked Questions

Is it safe to paste my JWT here?

Yes! This tool works 100% locally in your browser. The token is decoded using JavaScript on your device and is never sent to any server.

Does this tool verify the signature?

No, this tool only decodes the contents of the token so you can read the claims. It does not verify the cryptographic signature since the secret key is unknown.

Why do some JWTs fail to decode?

Ensure you pasted the entire token correctly. A valid JWT consists of three parts separated by dots (Header.Payload.Signature). If parts are missing or invalid, it will throw an error.

Why Docnify?

  • 100% Private (Client-side only)
  • Instant decoding
  • Clear visualization of Header and Payload
  • Copy parts individually

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