JWT Decoder
Paste a JWT (JSON Web Token) and decode its header and payload. Useful for developers to inspect JWT contents without verification.
Security Notice
This tool only decodes JWT tokens - it does not verify signatures. Never paste sensitive or production JWTs into online tools.
Sample JWT
JWT Structure
header.payload.signatureAbout JWT Decoder
A secure JWT (JSON Web Token) decoder that allows you to inspect and analyze the contents of JWT tokens without requiring verification. This tool safely decodes the header and payload sections of JWT tokens, displaying their contents in a readable JSON format for debugging and development purposes.
Why use a JWT Decoder?
When working with JWT tokens in authentication systems, you often need to inspect their contents for debugging, testing, or verification purposes. This decoder provides a quick and secure way to view JWT payloads without exposing sensitive information or requiring server-side verification, making it essential for API development and troubleshooting.
Who is it for?
Perfect for backend developers, API engineers, security professionals, and DevOps teams working with JWT-based authentication systems. Essential for anyone debugging authentication flows, testing API tokens, or learning about JWT structure and implementation in web applications.
How to use the tool
- Paste your JWT token into the input field (including the full token with all three parts)
- The tool automatically decodes and displays the header information
- Review the payload section to see claims, expiration dates, and other token data
- Analyze the token structure and verify the algorithm and other security parameters
- Use the decoded information for debugging authentication issues or API integration
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