Device Test Tools
Check cameras, microphones, keyboards, displays and controllers, or record locally with free browser-based device utilities. No AI or media uploads.
14 toolsMicrophone Test
Check microphone input with waveform, spectrum, live levels and optional quiet monitoring
Camera / Webcam Test
Preview a webcam locally, choose a camera and preferred resolution, inspect actual settings and save a PNG snapshot with optional mirroring.
LCD / Monitor / Display Test
Inspect display colors, gradients, checkerboards and pixel uniformity with slow pattern cycling and an optional fullscreen view in your browser.
Keyboard Test
Check registered keyboard codes, held keys, repeats and modifier states with a focused visual layout
Screen, Camera & Microphone Recorder
Record a screen, camera or microphone locally with pause, resume, preview and download
GPU / WebGL Test
Inspect reported WebGL graphics limits and run a short local rendering workload
Speaker & Stereo Channel Test
Play short left, right or stereo test tones with adjustable frequency and low volume
Mouse Buttons & Scroll Test
Test mouse buttons, scroll deltas, double clicks and pointer position in a local pad
Gamepad / Controller Test
Inspect connected controller buttons, analog values and raw axes with an adjustable dead-zone indicator
Touchscreen & Multi-Touch Test
Trace touch contacts across a coverage grid and inspect simultaneous pointers locally
Monitor Refresh Rate Test
Estimate visible-tab animation cadence in Hz with median frame intervals and slow-frame counts
Dead Pixel Test
Find dead and stuck pixels fullscreen
Click Speed Test (CPS)
Measure clicks per second over 1 to 60 seconds with a saved best
Reaction Time Test
Wait for green and measure your reaction time in milliseconds
Choosing the right device test
Device Test Tools let you check the hardware you rely on every day before a call, a game, a recording or a repair. Instead of guessing whether a problem comes from a webcam, a microphone, a keyboard or a display, you can run a focused test and see what your browser actually receives from each device.
Before an online meeting, use the Microphone Test to watch live levels and a waveform, and the Camera / Webcam Test to preview your image, choose a camera and confirm the resolution it is really delivering. The Speaker & Stereo Channel Test plays quiet left, right and stereo tones, which quickly reveals swapped or dead channels. If keys seem to stick or double, the Keyboard Test shows held keys, repeats and modifier states. The LCD / Monitor / Display Test cycles colors and patterns to help you spot stuck pixels or uneven backlight, and the Gamepad / Controller Test displays button presses and analog stick values with a dead-zone indicator. For lessons or bug reports, the built-in screen recorder captures and saves clips locally.
These tests run in your browser with no media uploads. Remember that results reflect what the browser reports, not a lab diagnosis. The refresh rate test estimates animation timing rather than the exact panel specification, and the graphics test runs a short rendering workload without making any claim about hardware health. Close other heavy tabs for steadier readings.