All Tools
JWT Decoder
Auth & SecurityDecode JWT tokens, inspect header & payload claims, and check expiry — entirely client-side.
What is JWT Decoder?
JWT Decoder splits a JSON Web Token into its three parts — header, payload, and signature — and displays them as readable JSON. It also checks whether the token has expired and shows key claims like issuer, subject, and issued-at time. Your token never leaves the browser.
Common Use Cases
- Debugging OAuth and authentication flows
- Checking if a token is expired before making API calls
- Inspecting custom claims added by your auth provider
- Verifying the algorithm and token type in the header
How to Use
- Paste a JWT token into the input field
- View the decoded header, payload, and claims summary
- Copy any section with one click