Is my secret key safe?

Absolutely. Everything is generated client-side using the native Web Crypto API. We never see your secret key.

Do you support RS256?

Currently, our client-side generator only supports symmetric HS256 signatures.

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Client-Side Only

Free Forever

Generate HMAC SHA256 JSON Web Tokens entirely in your browser.

Header (JSON)

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Payload (JSON)

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Secret Key (HMAC SHA256)

Generated Token

JWT

Click generate to create your token

Share this tool:

Enter your JSON header, payload, and secret key, then click 'Generate JWT'.

JWT Decoder

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Base64 Encoder / Decoder

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