Developer utility
Standalone tool pageJWT Decoder — Decode JSON Web Tokens Online
Decode JSON Web Tokens locally to inspect header, payload, and expiration details.
Header
Payload
Meta
How It Works
Enter your values into JWT Decoder, let the browser process the data, and review the result instantly.
Example
Example: use JWT Decoder to test a scenario before making a decision.
When to use this tool
- Debugging authentication flows during development.
- Inspecting token claims like sub, exp, aud, or roles.
- Quickly checking if a token is expired.
How to use the JWT decoder
- Paste a JWT token in the input box.
- The header, payload, and signature segments are parsed automatically.
- Review expiration, issued-at, and claim data in the decoded output.
Frequently Asked Questions
Does this tool verify the JWT signature?
No. This tool only decodes the header and payload for inspection. It does not verify the signature against a secret or public key.
Is it safe to paste my token here?
The decoding is done completely in your browser. No token data is sent to a server, but you should still avoid sharing sensitive production tokens casually.