Test your screen for backlight bleeding, IPS glow, and clouding with fullscreen black and gray patterns. Free online tool for monitors, laptops, and TVs.

Free online printer test tool. Print a test page with color bars, text, and alignment patterns. Check if your USB printer is recognized. No download.

Test stereo audio channels online free. Check left/right speakers, stereo panning, and channel balance. Works with headphones. No download required.

Test your monitor color accuracy online for free. Check color banding, gradient smoothness, grayscale, and SMPTE color bars. No download required.

Free online speaker test. Test left and right channels, run a frequency sweep, check bass and treble. Verify stereo balance in your browser. No download.

Free online USB device identifier. Read VID/PID from connected HID devices using WebHID API. Chrome or Edge required. No download, 100% private.

USBRecognized is a collection of free browser-based tools for testing computer devices and peripherals. Quickly check your keyboard, mouse, webcam, microphone, USB devices, display performance, and internet connection without installing software. Designed to be fast, simple, and privacy-friendly, our tools help verify that your devices are working as expected.