# JWT Generator

> Create Signed JSON Web Tokens Online

Free JWT generator. Create signed JSON Web Tokens with HS256, HS384, HS512 algorithms using Web Crypto API. No signup, no upload, 100% private browser.

URL: https://tools.scoreroute.com/tools/jwt-generator/

Markdown: https://tools.scoreroute.com/tools/jwt-generator/.md

## Create Your Token


### Generated Token


### What is JWT Generator?

A JWT (JSON Web Token) generator creates signed tokens used for authentication and secure information exchange. Unlike JWT decoders that only read tokens, a generator creates new signed tokens for testing your applications.

This online JWT generator runs entirely in your browser using the Web Crypto API. Your secret keys and token data never leave your device, ensuring complete privacy.


### Supported Algorithms


### JWT Structure

A JWT has three parts separated by dots:

- **Header** - Algorithm and token type
- **Payload** - Claims and data (not encrypted, just Base64URL encoded)
- **Signature** - Verifies the token hasn't been tampered with


### Common JWT Claims


### Use Cases

No. All JWT signing is done locally in your browser using the Web Crypto API. Your secret key never leaves your device.

These are HMAC algorithms using different SHA hash functions. HS256 is fastest and most common, HS512 is strongest but slowest. For most applications, HS256 is sufficient.

- Generate test tokens for API development
- Create tokens for authentication testing
- Prototype JWT-based auth systems
- Debug JWT issues by creating known tokens

## References

- [MDN — Regular Expressions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_expressions)
- [IETF — RFC Index](https://www.rfc-editor.org/)