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Real browser measurements. No invented hardware data.

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39 free online device tests

Free phone and PC testing tools

Find CPS, reaction, mouse Hz, keyboard ghosting, audio sync, motion blur, mic, speaker, touch, display, CPU/GPU, RAM, and internet tests.

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6 tests

Screen & displayScreen Test OnlineInspect the screen with full-window solid colors and gradients.InteractiveOpen Screen & displayDead Pixel TestCycle full-screen colors to find pixels that remain dark, bright, or stuck.InteractiveOpen Screen & displayScreen Color & Gradient TestCheck solid colors, grayscale, gradients, contrast steps, and banding.InteractiveOpen Screen & displayScreen Resolution CheckerCheck screen, viewport, DPR, orientation, color depth, and CSS resolution.InstantOpen Screen & displayRefresh Rate TestEstimate browser-observed Hz, interval stability, jitter, and missed frames.3 secondsOpen Screen & displayMonitor Motion Blur & Ghosting TestTrack an original moving target at four speeds and inspect blur, ghosting, and inverse trails.30 to 60 secondsOpen