Online diagnostic tool

Keyboard Tester Online

Press every key and see it light up instantly. No keystrokes are transmitted by this page.

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What is the Free Online Keyboard Tester?

Test keyboard keys online with a responsive visual keyboard for laptops, desktops and external keyboards.

✓ No installation✓ Works in compatible browsers✓ Privacy-focused testing

Keyboard testing tips

Test modifier keys individually and in combinations. Browser or operating-system shortcuts may intercept some keys before the webpage receives them.

Practical guide

Why use a no-download keyboard tester?

A browser keyboard test is useful when you want to confirm key input quickly without installing a utility. It can help after cleaning a keyboard, replacing a switch, testing a used laptop or checking whether a key failure is physical or limited to one application.

For a more reliable result

Press keys one at a time first so you can identify missing input clearly.
Then test common combinations such as Shift plus a letter, Ctrl shortcuts and multiple simultaneous gaming keys.
Check the numpad with Num Lock in both states if your keyboard has one.
Remember that the operating system or browser may reserve certain system shortcuts, so not every key combination can always be captured by a webpage.

What this test cannot confirm

The tester reports key events received by the browser. It cannot inspect the electrical switch, firmware or wireless signal directly, but consistent missing events are a useful clue when troubleshooting.

Explore more diagnostics

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Move between screen, camera, audio and device checks without returning to the homepage.

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Complete Screen TestRun pixels, colors, uniformity, contrast, sharpness and motion in one guided check.Dead Pixel TestInspect solid colors for dead, stuck, bright or dark pixels.Touch Screen TestCheck touch coverage, dragging continuity and dead zones.Keyboard TesterTest a full-size keyboard and confirm every key press.Mouse TesterTest buttons, wheel, movement, dragging and double-clicks.Audio TesterCheck speakers, stereo channels, tones and microphone input.Camera & WebcamTest built-in, USB, phone, tablet and compatible TV cameras.Microphone TesterView microphone levels, waveform, recording and playback.Pixel ExerciserExercise a suspected stuck-pixel area with changing colors.Gradient TestInspect gradients, tonal transitions and visible banding.Brightness & ContrastCheck black levels, white saturation and contrast separation.Screen Size TestView viewport, resolution, pixel ratio and display data.Text SharpnessInspect text rendering, browser scaling and clarity.Motion & GhostingObserve motion blur, ghosting and response behavior.Resolution & ScalingCheck screen resolution, CSS pixels and scaling.Device InformationReview screen, browser, hardware and platform information.Browser CapabilityCheck which browser APIs and hardware features are supported.Network TestCheck connection status, latency and estimated download speed.GPS & LocationTest browser geolocation, accuracy, altitude and speed.Sensor TesterTest orientation, motion, acceleration and rotation sensors.Multi-Touch TesterTrack multiple touch points, pinching and rotation gestures.Screen Color ToolsOpen exact full-screen color pages for pixel, uniformity and lighting checks.Response Time TestObserve ghosting, blur and pixel-transition behavior at several speeds.Stylus Drawing TestCheck pen, touch, pressure, tilt and drawing continuity in your browser.