All device tests

Press physical keys and inspect code, label, modifiers, repeat events, and simultaneous input.

See which keys your browser detects when you hold several at once.

Find the key and physical code received by a web application.

Type the text to start the timer. Choose 15, 30 or 60 seconds; backspace is allowed. WPM uses five correct characters per word, and accuracy compares your current text with the reference.

Check buttons, wheel directions, drag, hold, coordinates, movement trail, and browser event rate.

Check whether deliberate single clicks arrive unusually close together.

Measure the mouse movement event rate that reaches this browser.

Check up, down and horizontal scrolling, and look for unusual jumps.

Find your clicks per second in a short timed challenge.

Wait for the signal, then click as quickly as you can. Complete five attempts. Clicking before the signal is a false start and does not count as an attempt.

Inspect solid colors, gradients, uniformity, backlight bleed, motion, resolution, and estimated refresh rate.

Inspect black, white, red, green, blue and gray in fullscreen. Look for dots that remain a different color; use Previous, Next or swipe to compare.

This measurement runs automatically while this tab stays visible for five seconds. Inspect the estimated refresh rate, then open technical details for timing stability and delayed frames.

Read the browser-reported screen size and current viewport. Resize the window or rotate your device to see the values update; inspect scaling in technical details.

Choose a standard or custom color and enter fullscreen. Use the arrow controls or swipe to change color; Exit returns to the page.

View a live waveform, volume meter, spectrum, device settings, and a local record-and-playback sample.

Play left, center, and right channel cues plus low-volume selectable frequency tones.

Check left, center and right channels, then listen to stereo, bass and treble sweeps. Start with low system volume. Phase comparison is available in technical details.

Choose a frequency from 20 Hz to 20 kHz and play a short sine tone. Use presets for repeatable comparisons; other waveforms are in technical details.

Compare bass tones from 20 to 200 Hz at low volume. Choose a preset or use the sweep in technical details and listen for changes without raising the volume to compensate.

Preview a selected camera, inspect stream settings, switch facing mode, mirror, fullscreen, and save a local snapshot.

Inspect connected controllers, buttons, triggers, sticks, axes, deadzone, and optional vibration.

Connect a controller, start, and release both sticks. Reset before measuring the resting center; intentional movement also contributes to the maximum observed offset.

Move a stick and adjust the 0–30% deadzone. Compare the position with the shaded center; this visualization does not change your controller or game settings.

Visualize touch points, coordinates, pressure, trails, simultaneous contacts, and grid coverage.

Read supported orientation angles, acceleration, and rotation rate after explicit permission.

Request short, double, or patterned vibration on supported mobile browsers and devices.

Review browser-exposed viewport, screen, pixel ratio, CPU hint, touch, memory hint, and graphics capabilities.

Check optional WebHID, WebUSB, Web Bluetooth, Battery, and MIDI support before choosing any device.

WebGL Test. Start to request a graphics context and draw a color on the canvas. Open technical details for the capabilities actually exposed by this browser.

WebGPU Test. Start to request a graphics context and draw a color on the canvas. Open technical details for the capabilities actually exposed by this browser.

Printer Test Page: Text clarity, Thin lines, Grayscale, Color samples. Print at 100% scale with headers and footers disabled. Inspect the physical page for gaps, uneven density and misalignment.

Color Printer Test: Color samples. Print at 100% scale with headers and footers disabled. Inspect the physical page for gaps, uneven density and misalignment.

Black & White Printer Test: Text clarity, Grayscale. Print at 100% scale with headers and footers disabled. Inspect the physical page for gaps, uneven density and misalignment.

Printer Alignment Test: Alignment. Print at 100% scale with headers and footers disabled. Inspect the physical page for gaps, uneven density and misalignment.