Device Tools Hub

Get information about your device.

Keyboard tester, typing benchmarks, chatter detection, shortcuts, and input diagnostics in your browser.

Visual keyboard tester with key history, press counts, and lock indicators.

Test Arabic keyboard layout labels and key response in RTL view.

Measure WPM and accuracy with timed passages (30s, 1m, or 2m).

Keystroke dwell, flight time, bigram heatmap, and consistency score.

Classify switch sound as linear, tactile, or clicky via microphone FFT.

Find keys that double-register within a configurable threshold.

Estimate Hz from OS auto-repeat timing while holding a key.

Press a combo to see what it does on Windows, macOS, and Linux.

Count spacebar presses in 5, 10, or 30 seconds.

Estimate key press event delay with live MS samples.

Measure initial repeat delay and repeat rate in Hz.

Button tests, CPS benchmarks, polling estimate, LOD drift, aim trainer, DPI and eDPI math — all locally in your browser.

See left, middle, right, and scroll events with live press state.

Timed left-click CPS benchmark with peak rate and local best score.

Watch live pointer travel and speed as you move inside the test pad.

Emoji trail playground — move the pointer to paint and clear anytime.

Flag suspicious double-fires from a single intentional click per button.

Estimate Hz from mousemove timing in the browser (start/stop/restart).

Lift and re-enter the tracking area five times to average cursor drift.

Timed aim trainer: random targets, hits, misses, error, and reaction time.

Burst-friendly CPS with drag across the button and a per-second bar graph.

Right-button clicks per second with context menu suppressed in the arena.

Measure DPI from pointer travel plus keep eDPI while changing DPI.

Compute effective DPI and cm/360 from DPI, in-game sens, and yaw.

Sample pointer jitter with your hand off the mouse for several seconds.

Compare slow vs fast drags of the same distance to spot OS acceleration.

Spin around a center dot and count full rotations with peak spins/sec.

Screen fills, gamma and black/white ramps, touch mapping, PWM lab, ghosting demos, and a refresh-timing probe — all locally in your browser.

Solid colors, dot grid, and fullscreen fills for dead-pixel and uniformity checks.

Estimate animation frame cadence versus display refresh timing in-browser.

Swatches plus grayscale ladders to judge tint and near-black clipping.

Near-black fullscreen ramps to visualize edge glow on IPS and edge-lit LCDs.

Draw tap markers inside the arena to sanity-check mapping across the panel.

Simulated fullscreen brightness toggling across adjustable duty and frequency.

Striped ramps and stepped grays highlight nonlinear gamma and sharpening halos.

Watch the moving box. If you see a trailing blur or color smear behind it, your monitor has ghosting (slow pixel response). Increase speed to expose ghosting more clearly.

Free online black level test. Check whether your monitor crushes shadow detail with 32 near-black patches. Detect incorrect black-level mapping and gamma issues.

Free online white level test. Check whether your monitor clips highlights with 32 near-white patches. Detect crushed whites and incorrect contrast settings.

Free online monitor brightness test. Eleven grayscale steps from black to white reveal brightness, contrast, and gamma issues.

Checkerboard beside 50% gray—squint to see if averaged checker matches solid mid gray for contrast sanity.

Pixels per inch, dot pitch, megapixels, and aspect ratio from resolution plus diagonal.

Simplify pixel dimensions to ratios (for example 3840×2160 to 16:9).

Convert diagonal and aspect ratio into physical width and height in inches and centimeters.

Rule-of-thumb seating distance from screen diagonal plus optional multiplier presets.

Measured animation FPS from requestAnimationFrame timing for qualitative render cadence.

Browser-reported viewport, screen geometry, pixel ratio, and color depth diagnostics.

Cycle solid colors plus checker overlays fullscreen to spotlight uneven wear or risky static UI.

Near-black / near-white ladders and ramps to sniff limited HDMI (16–235) vs full RGB.

Fullscreen reference fills across gray/black/white and primaries to inspect clouding and tint.

Sample animation-frame spacing and highlight intervals much longer than the median streak.

Lagom-inspired 1px stripes, grille patterns, and text blocks to gauge scaling and sharpening.

Webcam preview and mirror utilities that run in your browser — no upload, no server-side recording.

Live camera preview with resolution, aspect, and FPS readouts; grab PNG snapshots locally.

Mirrored preview with brightness/contrast, rule-of-thirds grid, snapshot download, and fullscreen — all in-browser.

Microphone level checks, relative dB meter, and Web Audio speaker tests including sweeps and bass tones — all locally in your browser.

Live microphone level meter and peak readout via Web Audio—no recording or upload.

Stereo tones, sweep, balance demo, pink noise visualization, and quick L/R/Both playback checks in-browser.

Relative dB SPL style readout from the mic with rolling average—browser-only comparison aid.

Left / right / both / ping‑pong channel check plus logarithmic sweep from 100 Hz to 10 kHz.

Sine presets and sweeps from 20 Hz–200 Hz to stress subwoofers, monitors, or bass‑capable headphones.

Log-scale 20 Hz–20 kHz sweep with hearing-limit markers, manual tone hold, and estimated age ceiling readout.

React to a random-delay 880 Hz beep; tracks last, average, best, and worst over five rounds with false-start detection.

Walk tones through 5.1 or 7.1 channels (or stereo pan fallback) to verify speaker wiring and OS channel mapping.

Live mic autocorrelation tuner: Hz, note, octave, cents, 10 s pitch graph, and 2 s hold-peak for vocals or instruments.

12-step mosquito-tone screening from 8–20 kHz plus manual 8–22 kHz slider to estimate high-frequency hearing age.