Check your display
Free browser-based tools to test your screen, pixels, speakers, and more.
No account, no installation. Tests run directly in your browser.
Display tests
Find dead pixels, uneven backlighting, color issues, banding, ghosting and more.
Featured tests
- Display TestFill the screen with solid colors to spot tint, bleed, and uneven areas.
- Dead Pixel FinderCycle through solid colors to find pixels that are stuck or dead.
- Stuck Pixel FixerFlash rapidly changing noise over the screen to try to free a stuck pixel.
- Refresh Rate TestEstimate your display refresh rate and watch a motion test at that rate.
- Motion & Ghosting TestMove patterns across the screen to look for ghosting, blur, smearing and overdrive halos.
- Screen Uniformity TestFill the screen with uniform white, black, gray, red, green and blue to find uneven areas.
Audio tests
Confirm speakers and headphones work, hear the full frequency range, and check balance, bass, treble and distortion.
Featured tests
Microphone tests
Check that your microphone is detected, watch its input level live, and record a short clip to hear how you sound.
Input tests
Check every key, mouse button, touch point and gamepad control from your browser.
Featured tests
- Keyboard TestPress every key and see it light up on a visual keyboard to find dead or stuck keys.
- Mouse TestTest movement, left, right and middle clicks, scrolling and extra buttons.
- Touchscreen TestTouch every part of the screen to find dead zones and check multi-touch.
More input tests
View all 4 input testsCamera tests
Preview your webcam, switch between cameras, and see the resolution and frame rate the browser receives.
Device tools
See what your browser knows about your screen, device and supported web features.
Featured tools
- Device InformationSee what your browser knows about your device, screen, language and time zone.
- Screen Resolution TestSee your screen resolution, browser viewport and device pixel ratio, and how they differ.
- DPI / Pixel Density TestUnderstand device pixel ratio, CSS pixels and physical pixels, and what the browser cannot know.