Online JWT Decoder
The Online JWT Decoder is a web-based utility that allows users to decode JSON Web Tokens (JWT). By pasting a JWT into the provided text area or using the sample JWT, the tool decodes the header and payload sections of the token, presenting them in a human-readable format.
You can generate new JWT (JSON Web Token) using this online tool: Online JWT Generator
JWT:
Decoded Header:
Decoded Payload:
Online JWT Decoder Documentation
Overview
The Online JWT Decoder is a web-based utility that allows users to decode JSON Web Tokens (JWT). By pasting a JWT into the provided text area or using the sample JWT, the tool decodes the header and payload sections of the token, presenting them in a human-readable format.
What is JWT?
JSON Web Token (JWT) is a compact, URL-safe token format used for securely transmitting information between parties. It's often used in authentication and authorization protocols, including OAuth 2.0 and OpenID Connect.
A JWT typically comprises three parts: header, payload, and signature.
How to Use
Navigate to the Online JWT Decoder: Open the tool in your preferred web browser.
Input the JWT: Paste your JWT into the provided text area. Alternatively, use the pre-populated sample JWT for demonstration purposes.
Decode the JWT: Click on the Decode JWT button.
View the Results: The decoded header will be displayed in the "Decoded Header" textarea. The decoded payload will appear in the "Decoded Payload" textarea.
Features
Simple and Intuitive UI: With a minimalist design, the tool provides straightforward usability, minimizing the learning curve.
Sample JWT: A sample JWT is provided for demonstration purposes and quick testing.
Readable Format: The decoded header and payload are presented in a neatly formatted and human-readable JSON structure.
Error Handling: The tool alerts users if the provided JWT is invalid.
Safety and Security
While the Online JWT Decoder is designed for educational and debugging purposes, it's essential to note: No Data Transmission: The tool operates entirely client-side. No JWT data is sent to an external server, ensuring data privacy.
Avoid Using Sensitive Tokens: While the tool doesn't transmit data, avoid decoding JWTs that contain sensitive or confidential information in shared or public environments.
Limitations Signature Verification: The current version of the tool only decodes the JWT. It doesn't verify the token's signature.
Supported Algorithms: The decoder works with JWTs encoded with the HS256 algorithm. Tokens encoded using other algorithms might not be supported.
Conclusion
The Online JWT Decoder is a helpful tool for developers, testers, and security professionals seeking to understand the contents of a JWT without the need for complicated setups or installations. Always ensure to handle JWTs with care, especially if they contain sensitive data.
You can generate new JWT (JSON Web Token) using this online tool: Online JWT Generator
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