JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, and claims like expiration and issued-at. Completely browser-based - no data is sent to any server.
JWT token
Paste a JSON Web Token to decode its header and payload
Decoded JWT
Decoded header and payload will appear here after you paste a JWT and click Decode.
About the JWT Decoder
This JWT decoder lets you paste a JSON Web Token and see its header and payload in readable JSON. Expiration (exp) and issued-at (iat) are shown as dates, and you can copy the header or payload. All decoding happens in your browser—nothing is sent to a server.
Common use cases
- Debugging authentication: inspect claims and expiration of JWTs from your app or API
- Checking Bearer tokens from Authorization headers or OAuth responses
- Learning JWT structure: see how header (alg, typ) and payload (sub, exp, iat) are encoded
This free JWT decoder is part of our developer tools. It does not verify signatures—use it to inspect token contents only.
JWT Decoder FAQ
Related developer tools
More tools that complement JWT decoding in your workflow
SVG Viewer
View, validate, and preview SVG files with custom dark/light mode toggle
HTML Viewer
Paste HTML code and view the output in real time. Preview in light or dark mode—all in your browser
Password Generator
Create strong, secure, and random passwords with customizable length and character sets