JWT Generator

HS256 ยท RFC 7519

Build and sign HS256 JSON Web Tokens. Free online jwt generator to create custom claims and payloads client-side using Web Crypto API.

Runs 100% in your browser - zero server calls
Updated 2026-06-29
Header
Payload
Quick add:
Secret Key
Your secret never leaves your browser - signing is done via crypto.subtle (Web Crypto API).

How to generate a JWT online

This tool operates as a versatile jwt generator and create jwt online. Fill in your payload claims using the Builder UI or switch to Raw JSON mode for full control. Enter your HMAC secret, then click Generate Token. The tool signs the token using HS256 via the browser's Web Crypto API and outputs the complete JWT.

What are standard JWT claims with CREATE JWT ONLINE

sub (subject), iss (issuer), aud (audience), iat (issued at), exp (expiry), and nbf (not before) are the standard registered claims defined in RFC 7519. Use the Quick Add buttons to insert them with sensible defaults.

Frequently Asked Questions

Is it safe to use this jwt generator with a real secret?

Yes, this jwt generator builds and signs tokens entirely within your local browser sandbox, preventing secret key exposure.

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