A curated list of free, browser-based tools for testing keyboards, mice, monitors, webcams, microphones, and audio hardware. No installs, no logins.
Maintained by nasirazizawan009.
- KeyboardTester.click - Free, open-source diagnostic suite. Per-key tester, NKRO/ghosting check, USB polling rate (Hz) estimator, switch chatter detector, switch sound classifier, key repeat rate.
- Keyboard Ghosting Test - Detect which key combinations your keyboard cannot register.
- N-Key Rollover Test - Find your keyboard actual NKRO limit.
- Stuck Key Test - Check for stuck or unresponsive keys.
- Typing Test - Words-per-minute and accuracy measurement.
- Mouse Tester - Left/right/middle click and scroll-wheel verification.
- Click Speed Test - CPS (clicks per second) measurement.
- DPI Tester - Calibrate and verify mouse DPI.
- Ghost Click Detector - Detect double-clicking from a single press.
- Scroll Wheel Test - Test scroll wheel accuracy and direction.
- Double Click Test - Verify double-click registration.
- Latency Checker - Measure input lag.
- Screen Test - Solid color, gradient, and pattern test screens.
- Dead Pixel Test - Find dead or dark sub-pixels.
- Stuck Pixel Test - Find always-on (stuck) pixels.
- Black Screen Test - Reveal backlight bleed and uniformity issues.
- White Screen Test - Detect dust, smudges, and stuck pixels.
- Monitor Sharpness Test - Lagom-style 1-pixel grid plus RGB sub-pixel ruler.
- Webcam Test - Verify camera function in browser.
- Camera Resolution Test - Detect actual capture resolution.
- Webcam Mirror - Virtual mirror with snapshot.
- Take Picture With Webcam - Quick webcam still capture.
- Mic Tester - Live waveform plus peak-level meter.
- Test My Mic - Quick microphone check.
- Microphone Volume Test - Visual volume monitoring.
- Headphone & Speaker Tester - Hub for audio output diagnostics.
- Frequency Response Test - 20 Hz to 20 kHz log sweep.
- Pitch Detector - Hz, note, and cents readout.
- Hearing Age Test - Mosquito-tone screening (8-22 kHz).
- Stereo Test - L/R channel verification.
- Left/Right Speaker Test - Confirm stereo channel routing.
- eDPI Calculator - Effective DPI for FPS games.
- FOV Calculator - Field of view conversion across games.
- RAM Latency Calculator - True latency from CL and frequency.
- Online Ruler - Credit-card-calibrated SVG ruler.
Open a PR adding any free, browser-based, no-login hardware testing tool. Format:
- [Tool Name](https://example.com/tool) - One-sentence description focused on what the tool measures or detects.