DevUtilX

JWT Decoder Online

Decode JSON Web Tokens (JWT) and inspect their header and payload instantly. This tool works entirely in your browser for privacy and security.

How to Use the JWT Decoder

  1. Paste your JWT into the input editor
  2. Click the "Decode" button
  3. View the decoded header and payload in JSON format
  4. Copy results using the copy buttons

💡 Note: This tool only decodes JWT tokens. It does not verify the signature or check validity. Always validate tokens securely in your backend.

What is a JWT Decoder?

A JWT (JSON Web Token) Decoder is a tool that breaks down a JWT into its three constituent parts: the header, the payload, and the signature. It then decodes the header and payload from Base64Url format into readable JSON, allowing you to inspect the information they contain.

Why Use Our JWT Decoder?

  • Debugging: To quickly inspect the claims and metadata within a JWT during development to ensure they are correct.
  • Learning: To understand the structure of a JWT and see what information is typically stored in the header and payload.
  • Verification: To manually check the contents of a token before performing signature validation.
  • Convenience: To have a simple, client-side tool for decoding JWTs without sending them to a server.

🚀 Explore More Free Developer Tools

Don’t stop here! Supercharge your workflow with our other powerful converters & formatters.

✅ JWT Validator

Validate JSON Web Tokens

🔒 Base64 Decoder

Decode Base64 strings

✅ JSON Validator

Validate JSON data structure

💡 New tools are added regularly — bookmark DevUtilsX and stay ahead!

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