JWT Decoder
Decode and inspect JWT tokens.
About this tool
Decode JSON Web Tokens (JWT) to inspect their header and payload. The token is never verified or sent anywhere.
Key Features
- Decodes header & payload
- Pretty-printed JSON
- Detects expiry (exp)
- 100% client-side
How to Use
- Paste a JWT.
- Click Decode.
- Inspect the header and payload.
Benefits
- Debug auth tokens
- Inspect claims & expiry
- Understand API payloads
Frequently Asked Questions
No — decoding a JWT reveals its contents but does not verify the signature, which requires the secret key.