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DevKitJWT ToolsGenerator

JWT Generator

Build and sign a JSON Web Token from a header, payload and secret.

Header
Payload
Sign Signature
Algorithm
HMAC Secret

JWT Generator & Builder

Need to craft a custom JSON Web Token for testing your API endpoints? Our JWT Generator lets you easily edit a JSON payload and header, choose an algorithm, and securely sign a new token using your own secret key—all right inside your browser.

Zero Data Tracking: Your secrets and payload data are never sent to a server. Token generation is performed locally using the Web Crypto API.

Core Features

  • Custom Payload SupportEdit the JSON payload directly in our rich syntax-highlighted editor with auto-formatting.
  • Multiple AlgorithmsSupports signing with symmetric keys (HS256, HS384, HS512) and asymmetric keys (RS256, ES256, etc.).
  • Instant GenerationYour final JWT string is generated dynamically in real-time as you type your payload or secret.

Example

Input Header
{
  "alg": "HS256",
  "typ": "JWT"
}
Input Payload
{
  "role": "admin",
  "exp": 1716239022
}
Generated JWT
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyNyb2xlIjoiYWRtaW4iLCJleHAiOjE3MTYyMzkwMjJ9.H4O_cE76N5j-L5_r5mXw7e7-w2zH5775c74t_5k6bMw

Related Tools

JWT DecoderDecode and inspect a token's header and payload.JWT ValidatorVerify a token's signature against a key.Secret GeneratorGenerate secure, cryptographically random signing keys.

Quick Tips

  • Standard claims like iss (Issuer) and sub (Subject) can help structure your auth logic.
  • Don't put passwords or private keys in the payload!