Free JWT Decoder & Inspector Online
Decode and inspect JSON Web Tokens (JWT) instantly. View header, payload, signature, and expiration status with color-coded visualization.
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Header Payload Signature
Note: Signature verification requires the secret key and is not possible client-side.
How to Use
- Paste a JWT token into the input textarea (or click Load Sample to try)
- Click Decode JWT to inspect the token (also auto-decodes on paste)
- View the color-coded token: Header . Payload . Signature
- Check the expiration status bar to see if the token is still valid
- Standard claims (iss, sub, exp, iat, etc.) are annotated with descriptions
- Copy individual sections using the Copy buttons
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