JWT Decoder & Inspector
Paste a JSON Web Token to inspect its header, payload, and signature. Tokens are decoded entirely in your browser - nothing leaves your device.
Heads up: DevTools is open
With "Disable cache" on in the Network tab, every page will skip the service worker cache - costing you offline support. The app may also auto-reload more aggressively when an update arrives. Close DevTools for the smoothest experience.
Paste a JSON Web Token to inspect its header, payload, and signature. Tokens are decoded entirely in your browser - nothing leaves your device.