UDevice vs JSON Web Token

Make device debugging, network diagnostics, and security research more efficient. The app includes a rich set of professional tools covering network packet capture, request rewriting, SSH, local terminal, Python 3, file management, cookie editing, log analysis, JSON formatting, regular expressions, Ping, DNS lookup, Traceroute, port scanning, LAN scanning, and more. You can also view real-time device status and key system information, including CPU, system, network, memory, display, browser environment, and other device data, helping you quickly understand the current state of your device. Whether for development debugging, testing and troubleshooting, security research, or daily device management, everything can be done in one app.

JSON Web Token is the fastest way to build, decode and verify JWTs on iPhone, iPad and Mac. Paste any token and instantly see its header and payload, neatly typed and editable. Sign your own tokens with the algorithm of your choice, verify signatures against your own keys, and copy the result with one tap. BUILD • Create tokens from scratch with editable header and payload fields • 12 signing algorithms: HS256/384/512, RS256/384/512, PS256/384/512, ES256/384/512 • One-tap generation of real random keys for every algorithm family VERIFY • Paste your own HMAC secret or public key to verify any token • Clear verified/invalid signature badge • Tamper with the payload and watch the signature react INSPECT • Typed values: strings, numbers, booleans, arrays, nested objects, null • JSON view with configurable indentation, ready to copy • Header and payload sizes in bytes • Date helper to convert timestamps for iat, exp and nbf claims Built for developers: no account, no tracking, everything stays on your device.