Developer Tools
JWT Decoder
Decode JWT header and payload directly in your browser.
Inspect JSON Web Token header and payload claims without sending the token to a backend service.
This tool only decodes JWTs. It does not verify signatures.
JWT Decoder
Decode JWT header and payload locally in your browser.
Header
// Header JSON will appear here.Payload
// Payload JSON will appear here.Signature
// Signature will appear here.How to use
- 1. Paste a JWT
Add a token with header, payload, and signature parts separated by dots.
- 2. Decode locally
The header and payload are Base64URL-decoded and formatted as JSON.
- 3. Verify elsewhere
Use a trusted verification flow when you need to confirm token authenticity.
Example
A JWT has three dot-separated parts: header, payload, and signature. This tool decodes the first two parts as JSON and displays the signature text separately.
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