JWT Generator & Signer
Generate and sign JSON Web Tokens (JWT) client-side instantly. Configure custom headers, payloads, claims, and sign keys securely.
About JWT Generator & Signer
JWT Generator & Signer allows you to craft, configure, and cryptographically sign JSON Web Tokens entirely in your browser. Zero server-side processing. Your private keys and secrets never leave your machine.
How It Works:
• Configure the signing algorithm (HMAC, RSA, or ECDSA) and provide the corresponding key or secret.
• Use the Payload Claim Builder to set standard claims like Subject, Issuer, Audience, and Expiration without writing JSON by hand.
• Switch to the Raw JSON editors to have full control over the Header and Payload contents.
• The token is signed live as you type — paste the result directly into your app or verify it with the JWT Decoder tool.
Supported Algorithms:
• HS256, HS384, HS512 — HMAC-SHA symmetric signing. Use a shared secret string.
• RS256, RS384, RS512 — RSA-PKCS1-v1.5 asymmetric signing. Use a PKCS#8 private key.
• PS256, PS384, PS512 — RSA-PSS asymmetric signing. Use a PKCS#8 private key.
• ES256, ES384, ES512 — ECDSA asymmetric signing. Use a PKCS#8 EC private key.
• none — Creates an unsigned token for testing (should never be used in production).