JWT Token Builder
Build JWT tokens visually with custom header and payload claims. Sign with HMAC-SHA256 using the Web Crypto API. Decode existing tokens. All processing happens client-side.
21.1Kuses
9.4/10(459)
HEADER
PAYLOAD CLAIMS
SIGNING SECRET
Your secret key stays in your browser and is never transmitted.
How to Use the JWT Token Builder
- Add your payload claims using the visual editor with key, value, and type.
- Enter your HMAC secret key for signing.
- Click Generate Token to create a signed JWT.
- Switch to the Decode tab to inspect any existing JWT token.
Features
- Visual claim editor with type support (string, number, boolean)
- HMAC-SHA256 signing via Web Crypto API
- Token decoder with header and payload inspection
- Pre-populated with common claims (sub, iat, exp)
- 100% client-side -- secret key never leaves your browser
⚡ Pro OptionsSponsored
Some links on this page are affiliate links. If you click and make a purchase, we may earn a commission at no extra cost to you.
Recommended Products
Ad🔐Hardware WalletsShop →🔑Security KeysShop →👁️Privacy ScreensShop →💾Encrypted USB DrivesShop →📱Faraday BagsShop →💻Laptop StandsShop →🖱️Wireless MouseShop →🔌USB-C HubShop →👓Blue Light GlassesShop →🖥️Desk PadShop →
Affiliate Disclosure: As an Amazon Associate, ToolBird earns from qualifying purchases. Links above are affiliate links — if you buy through them, we may earn a small commission at no extra cost to you.
Disclaimer: This tool is provided as-is for informational and educational purposes only.