JWT Tool • Free Online • No Signup

JWT Generator Online

Generate JWT tokens online using custom header, payload, algorithm, and secret values directly in your browser. This tool is useful for testing authentication flows, API development, demos, and debugging token-based systems.

Last updated: March 2026

Header JSON

Payload JSON

Algorithm

Secret (HS256 only)

Generated JWT

Ready to generate JWT.

Fast • Free • Browser-Based

Generate JWT tokens instantly for testing and development

JWTs are commonly used for authentication, authorization, and API communication. This tool helps developers create sample tokens quickly for local development, demos, authentication testing, and token-based debugging workflows.

✅ Generate JWT

✅ HS256 support

✅ Custom payloads

✅ Browser-based

Use this for testing and development

This JWT generator is useful for local development, debugging, demos, and test environments. Be careful with secrets and production credentials when using browser-based tools.

For more details about site usage and analytics, read our Privacy Policy.

How to use this JWT Generator

Edit the header JSON and payload JSON, choose an algorithm, optionally enter a secret for HS256, then generate the token. You can then copy the JWT for use in testing and debugging workflows.

Enter or edit the header JSON.
Enter or edit the payload JSON.
Select HS256 or none.
Enter a secret if using HS256.
Click Generate JWT and copy the result.

Example payload

{
  "sub": "1234567890",
  "name": "John Doe",
  "admin": true
}

Common use cases

Authentication testing
API debugging
Demo token creation
Claim inspection workflows
Local development

What is a JWT generator?

A JWT generator is a tool that creates JSON Web Tokens from a header, payload, and optional signing secret. It is especially useful when testing authentication systems, building protected APIs, validating claims, and simulating login flows during development.

This page allows you to generate unsigned tokens or HS256-signed tokens directly in the browser, making it useful for quick JWT testing workflows.

What is a JWT?

JWT stands for JSON Web Token. It is a compact format used to transfer claims between systems, commonly in authentication and authorization workflows. A JWT usually contains a header, a payload, and a signature.

Why use a JWT generator online?

A browser-based JWT generator helps developers quickly create tokens without writing extra scripts or installing libraries. It is useful when testing auth flows, verifying payload structures, creating sample tokens, and debugging API behavior.

Testing: create sample tokens quickly.
Debugging: verify claims and token structure.
Demos: simulate auth flows in development environments.
Convenience: generate JWTs without extra tooling.

Which algorithms does this version support?

This version supports unsigned tokens using none and signed tokens using HS256. HS256 uses a shared secret to generate the token signature.

Frequently Asked Questions

What is a JWT?

JWT stands for JSON Web Token. It is a compact token format used to securely transfer claims between systems, especially in authentication and authorization workflows.

Does this tool support signing?

Yes. This version supports unsigned tokens and HS256-signed tokens.

Can I customize the payload?

Yes. You can edit both the header JSON and the payload JSON before generating the token.

Is this JWT generator free to use?

Yes. This tool is free to use online and works directly in the browser.

Can I use this for API testing?

Yes. It is useful for generating test tokens for local development, API debugging, authentication testing, and demo environments.

Should I use production secrets here?

It is better to avoid using sensitive production secrets in browser-based tools. Use test values whenever possible.