JWT Generator: Create Test Tokens Without a Backend

Testing JWT auth? You need tokens. Most guides tell you to set up a backend or use jwt.io (which sends your secret to their servers). I built a JWT generator that runs entirely in your browser using Web Crypto API. What it does Set standard claims: sub, name, iss, exp Add custom claims as JSON (role, permissions, etc) Choose secret key for HS256 signing Color-coded output (header.payload.signature) Copy token in one click Privacy Your secret key never leaves the browser. Signing uses crypto.subtle.sign() — the browser native crypto API. JWT Generator Pair it with: JWT Decoder — Decode and inspect tokens Base64 Decoder — Decode token parts manually Full toolkit (280+ tools): devtools-site-delta.vercel.app