JWT Decoder
Developer ToolsDecode and inspect JWT tokens. View header, payload, signature, and check expiration status.
How to use JWT Decoder
- 1Enter your input in the text area above
- 2Click the action button to process your data
- 3View the result and copy it to your clipboard
Common Use Cases
Token Debugging
Decode and inspect JWT tokens for debugging.
Security Audit
Verify JWT token contents and expiration.
API Testing
Inspect authentication tokens during API testing.
Access Control
Check user roles and permissions in tokens.
Frequently Asked Questions
What is a JWT token?
JSON Web Token (JWT) is a compact, URL-safe token format used for securely transmitting information between parties. It consists of three parts: Header (algorithm and type), Payload (claims/data), and Signature (verification).
Is it safe to decode JWT tokens online?
Yes, for decoding only. Our tool runs entirely in your browser β your token is never sent to any server. However, never share secret keys or paste tokens containing sensitive data on untrusted websites.
What does the 'exp' claim mean?
The 'exp' (expiration) claim is a Unix timestamp indicating when the JWT will expire. After this time, the token should be rejected by the server. Our tool automatically converts this to a human-readable date and shows remaining time.
Related Tutorials
Learn more about how to use JWT Decoder effectively
JWT Decoding Tutorial: How to Read and Debug JSON Web Tokens
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