JWT Encoder
NewCreate JSON Web Tokens (JWTs) with custom headers, payloads, and HMAC-SHA256 signatures. JWTs are used for stateless authentication, API authorization, and secure information exchange. Build your token by editing the header and payload JSON objects, entering a signing secret, and the tool generates a signed JWT you can use for testing API endpoints, learning JWT structure, or generating test tokens.
JWT Encoder
Encode and sign a JSON Web Token (JWT) with HMAC-SHA-256. Browser-side only — your secret never leaves your device.
How to Use JWT Encoder
- 1Edit the JWT header JSON
- 2Edit the JWT payload with your claims
- 3Enter a signing secret key
- 4Copy the generated JWT token
Your Privacy is Protected
JWT Encoder runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
What is a JWT?
A JWT (JSON Web Token) is a compact, URL-safe token format with three Base64url-encoded parts: header, payload, and signature, separated by dots.
Should I use JWTs for sessions?
JWTs are stateless and good for short-lived tokens. For long sessions, traditional session tokens with server-side storage are often more secure.
Why Use This Tool?
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