Header
Header will appear here... Payload
Payload will appear here...How it works
Paste a JWT token to decode its three parts: Header, Payload, and Signature. The header and payload are Base64URL-encoded JSON objects.
- Header - Contains the algorithm (HS256, RS256, etc.) and token type
- Payload - Contains claims like subject, issuer, expiration, and custom data
- Signature - Used to verify the token (requires the secret key)
This tool only decodes tokens locally. It does not verify signatures.
Want to learn more?
Read the complete guide with examples and tips