JWT Toolkit
🔒100% Secure & Client-Side. Your tokens and keys never leave your browser.

JWT Encoder

Build a JWT from scratch. Choose your signing algorithm, edit parameters, and sign instantly.

Header
Payload
Signature Configuration
HMAC Secret Key
Signing Function:
HMAC-SHA256(base64UrlEncode(header) + "." + base64UrlEncode(payload), secret)
Encoded Token Output