tools
Learn how web systems identify your local timezone, UTC/GMT offset, and daylight saving properties online for free. Check timezone settings locally.
Learn how web systems identify your browser type, OS version, and rendering engine. View and parse your user agent string locally.
Learn how to detect CSS media query breakpoints and active screen sizes online for free. Inspect responsive viewports locally in your browser.
Read real-time ambient light sensor data and lux values online. Test environmental light responsiveness and auto-brightness triggers in browser.
Visualize real-time gyroscope and accelerometer data directly in your browser. Perfect for testing device motion, orientation, and tilt support.