Hardware Diagnostic Tools
Start with a core input or display diagnostic, then use focused follow-up checks for the same device or signal.
01 / Input
Input
Check browser-visible signals from pens, touchscreens, mice, keyboards, and controllers.
Stylus & Pen Test
Test stylus pen pressure, tiltX/tiltY, pointer type, and drawing response in the browser using the Pointer Events API.
Touchscreen Test
Test touchscreen multi-touch support, touch IDs, coordinates, and browser touch input on phones, tablets, laptops, and touch monitors.
Mouse Test
Check left click, right click, middle click, scroll wheel up/down, and double-click issues online.
Mouse Polling Rate Test
Check mouse polling rate and mouse Hz with median, peak, distribution, and stability metrics.
Double Click Test
Check mouse double-click issues, switch chatter, click interval, and accidental double clicks online.
Keyboard Test
Test every key on your keyboard, check keyboard ghosting, key chatter, rollover, and polling rate online.
Key Rollover Test
Test keyboard anti-ghosting and N-key rollover (NKRO) by pressing multiple keys simultaneously and seeing which register.
Controller Test
Test controller buttons, triggers, analog sticks, deadzones, and stick drift in your browser.
02 / Display
Display
Inspect pixels, motion, refresh timing, uniformity, contrast, HDR setup, and visible flicker patterns.
Dead Pixel Test
Check your monitor, laptop, TV, or phone for dead pixels, stuck pixels, backlight bleed, and IPS glow with full-screen color patterns.
Screen Uniformity Test
Check backlight bleed, IPS glow, dirty screen effect, clouding, and color tinting with full-screen solid colors.
Refresh Rate Test
Check monitor Hz, 60Hz, 144Hz, 240Hz, frame pacing, and display refresh rate online.
Response Time Test
Check monitor ghosting, motion blur, inverse ghosting, overdrive artifacts, and pixel response online.
Brightness & Contrast Test
Calibrate monitor brightness and contrast with near-black, near-white, ANSI contrast, PLUGE, and white clipping patterns.
Screen Burn-In Test
Check OLED, AMOLED, and LCD image retention using solid colors, gray screens, and checkerboard patterns.
HDR Test
Check HDR setup, near-white clipping, shadow detail, contrast, and color volume using browser-rendered test patterns.
Monitor Flicker Test
Display simulated flicker patterns from 30 to 1000 Hz for visual inspection. Includes motion ruler mode and a warning-gated strobe mode.
03 / Audio + Video
Audio & Video
Verify browser permission, live input, playback channels, and camera output before troubleshooting hardware.
Sound Test
Test speakers, headphones, left/right stereo channels, frequency sweep, bass, and microphone input online.
Microphone Test
Free microphone test online. Check mic input level, peak clipping, and live waveform in your browser.
Webcam Test
Test your webcam or camera. Check live preview, resolution, frame rate, permissions, and image quality.
Supporting checks
Focused follow-up tests
Use these after a core diagnostic points to a narrower device, setting, or signal.
Color Gradient Test
Check monitor color banding, posterization, gradient smoothness, and 8-bit vs 10-bit bit depth online.
Bass Test
Test your subwoofer and speakers with low-frequency tones from 20 Hz to 200 Hz. Find the lowest bass your system can reproduce.
Mouse DPI Test
Estimate your mouse DPI by moving it a measured distance. Compare repeated browser readings with your configured sensitivity.
Headphone Test
Test headphone channel balance, frequency sweep, and phase response. Verify left/right audio and stereo imaging.
Scroll Speed Test
Test your mouse scroll wheel speed and behavior. Measure deltaY values, scroll direction, and events per second.
Stuck Pixel Fixer
Rapidly cycle colors to try fixing stuck pixels on LCD monitors, TVs, laptops, and phones.
Speaker Channel Test
Test individual speaker channels including left, right, center, and surround. Verify each speaker in a multi-channel setup.
Xbox Controller Test
Test Xbox controller buttons, analog sticks, triggers, and D-pad in your browser. Detect stick drift with adjustable deadzone.
Black Level Test
Check monitor black level, near-black shadow detail, black crush, lifted blacks, and PLUGE calibration online.
Switch Controller Test
Test Nintendo Switch Pro Controller and Joy-Con buttons, sticks, and triggers in your browser. Detect Joy-Con drift.
White Point Test
Check monitor color temperature, D65, 6500K, white balance, warm/cool tint, and gray ramp neutrality online.
Webcam FPS Test
Estimate webcam frame-update rate delivered to your browser. View the live feed with resolution and device info.
PS5 Controller Test
Test DualSense buttons, triggers, analog sticks, deadzones, and stick drift in your browser.
Aspect Ratio Test
Verify monitor geometry with circle test, grid, diagonals, crosshair, and ruler patterns. Detects display resolution and closest aspect ratio.
Screen Resolution Checker
Display browser-reported resolution, available area, device pixel ratio, estimated pixel dimensions, color depth, and orientation.
Color Depth Test
Check your display color depth and view gradient test patterns to detect 8-bit vs 10-bit color banding.
FPS Test
Measure browser animation-frame timing over 10 seconds using requestAnimationFrame. See average, min, and max FPS with a live bar chart.
Input Lag Test
Measure browser-level click-to-frame latency using requestAnimationFrame. See average, best, and worst lag across 10 clicks.
Utilities
More Tools
Useful browser utilities and performance exercises that are available without defining the site’s core diagnostic focus.
Click Speed Test (CPS/CPM)
Measure your click speed with 10s/30s/60s timers. Track CPS/CPM, left/right clicks, and share results.
Reaction Time Test
Measure your reflex speed in milliseconds with a 5-round click test. Compare to gamer and average population benchmarks.
Aim Trainer
Click targets to train mouse accuracy and measure targets per second. Three difficulty levels: large, medium, and small targets.
Mouse Accuracy Test
Precision click test — click stationary targets and measure your accuracy percentage and click speed across difficulty levels.
Typing Speed Test
Measure your typing speed in words per minute (WPM) and accuracy. Choose 30s or 60s mode with color-coded word feedback.
Hearing Range Screening
Non-calibrated browser hearing range screening with tones from 125 Hz to 16000 Hz. Compare left/right perception and learn when a clinical audiogram matters.
Color Vision Screening Test
Simplified Ishihara-style color vision screening with 8 colored dot plates. Results are browser-based and not medical diagnosis.
Network Latency Test
Measure browser-to-server HTTP request round-trip time with 10 requests. See average, min, and max response time in milliseconds.
Browser Benchmark
Benchmark your browser JavaScript engine with Math, DOM, String, and Array workloads.
GPU Stress Test
Stress the browser rendering pipeline with a Canvas animation of 500 moving circles and monitor live FPS.
CPU Benchmark
Benchmark browser JavaScript CPU speed with integer math, float math, prime sieve, Fibonacci, and JSON parsing.
RAM Checker
Check browser memory usage, JS heap size, approximate device memory, and run a 50MB allocation speed test.
Screen Recorder
Record your screen directly in the browser using the Screen Capture API. Download recordings as WebM video files.