About JWT Decoder
The JWT Decoder allows you to decode JSON Web Tokens and view their readable header and payload without verifying the signature. This is helpful for debugging authentication flows or inspecting API responses.
What can you see?
- Header: Token type and signing algorithm
- Payload: Claims such as user ID, roles, and expiry time
How to use it
- Step 1: Paste the full JWT string.
- Step 2: Click Decode JWT.
- Step 3: Review the decoded JSON content.
Who should use this?
This tool is designed for developers, API testers, and security professionals. If your token comes URL-encoded, decode it first using the URL Encode / Decode tool.
Important note
Decoding a JWT does not verify its authenticity. Always validate the signature and claims on the server side when security matters.