JWT Encoder

Create and encode JSON Web Tokens (JWT) with custom header, payload, and secret key. Perfect for developers testing JWT implementation.

Security Notice

This is a demo tool for learning purposes. Never use weak secrets or expose sensitive information in production JWTs.

JWT Configuration

Standard claims: sub, iss, aud, exp, nbf, iat, jti
For HS256, use a secret of at least 256 bits (32 characters)

Generated JWT Token

No JWT Generated Yet

Configure your payload and secret, then click "Encode JWT" to generate a token

JWT Standard Claims Reference

Registered Claims

iss
Issuer
Who issued the token
sub
Subject
Who the token is about
aud
Audience
Who the token is intended for
jti
JWT ID
Unique identifier for the token

Time-based Claims

iat
Issued At
When the token was issued (Unix timestamp)
exp
Expiration Time
When the token expires (Unix timestamp)
nbf
Not Before
Token is not valid before this time
Tips
  • • All claims are optional, but exp is highly recommended for security
  • • Time claims use Unix timestamps (seconds since epoch)
  • • You can add custom claims alongside standard ones
  • • Use the +iat and +exp buttons for quick timestamp insertion

About JWT Encoder

A comprehensive JWT (JSON Web Token) encoder that allows you to create, customize, and generate valid JWT tokens with custom headers, payloads, and secret keys. This tool supports multiple signing algorithms and provides real-time token generation for development and testing purposes.

Why use a JWT Encoder?

Creating JWT tokens manually for testing authentication flows, API development, or integration testing can be time-consuming and error-prone. This encoder streamlines the process by providing an intuitive interface to generate properly formatted and signed JWT tokens, ensuring your authentication testing is both efficient and accurate.

Who is it for?

Essential for backend developers, API engineers, QA testers, and security professionals who need to generate JWT tokens for testing authentication systems. Perfect for developers learning JWT implementation or experienced teams who need quick token generation for development and testing workflows.

How to use the tool

1

Configure the JWT header with your desired algorithm (HS256, RS256, etc.)

2

Add custom claims and data to the payload section

3

Enter your secret key or private key for token signing

4

Click generate to create your encoded JWT token

5

Copy the generated token for use in your applications or API testing tools

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