JWT Generator

Generate JWT tokens with HS256, HS384, or HS512 secrets for API debugging.

Use this page to generate JWTs with an HMAC secret. It focuses on Header JSON, Payload JSON, and secret and produces a copyable JWT token.

How to use

Prepare Header JSON, Payload JSON, and secret and paste, upload, or enter it as requested by the page.
Adjust the available options, then run the process, conversion, generator, or lookup.
Review a copyable JWT token, then copy, download, or continue editing the result.

Examples

Typical use

Input

{"sub":"51tools","iat":1717200000}

Output

Outputs a token in header.payload.signature format.

Privacy

Processed in browser Input not stored Review sensitive data

The input is mainly processed in your browser, and the page only uses browser capabilities needed to generate the result.

Frequently asked questions

Use Header JSON, Payload JSON, and secret as expected by this page. If validation fails, try a smaller sample and check encoding, separators, file type, or expression syntax.

The usual causes are input format issues, browser support, or option settings. Verify the workflow with the sample first, then replace it with your own data.

You can copy ordinary results, but review critical fields and edge cases before production use, official submission, financial calculation, or publication.

Next steps

Related tools

After finishing this task, continue with these related tools.

RSA Key Generator JWT Decoder and Verifier RSA Encryption and Signature Tool HMAC and SHA Hash Generator