Test your hardware in the browser
38 free diagnostics for your keyboard, mouse, screen, camera, speakers, microphone and connection. Everything runs on this device, and nothing is uploaded.
- Nothing is uploaded
- No install
- Free, no sign-up
Most used
No tool or guide matches that. Try a device name such as mouse, webcam or speaker.
Input devices
Keyboard, mouse, controller, touch and pen · 12 tools
- Keyboard TestFind dead keys, ghosting and rollover limits
- Mouse TestCheck left, right, middle, side buttons and wheel
- Double-Click TestDetect a mouse that double-clicks by itself
- Polling Rate TestMeasure mouse Hz: 125, 500, 1000, 4000 and 8000
- Click Speed TestCount your clicks per second (CPS)
- Mouse DPI TestMeasure the real DPI of your mouse
- Scroll Wheel TestFind a jumpy or skipping mouse wheel
- Gamepad TestTest controller buttons, triggers and stick drift
- Touchscreen TestCheck multi-touch and find dead zones
- Stylus & Pen TestCheck pen pressure, tilt and palm rejection
- Typing Speed TestMeasure your words per minute and accuracy
- Reaction Time TestHow fast do you react? Five rounds, average in ms
Display & camera
Monitor pixels, refresh rate, colour and webcam · 9 tools
- Dead Pixel TestFind dead and stuck pixels and backlight bleed
- Pixel HealerFlash colours to fix stuck pixels
- Refresh Rate TestCheck if your monitor really runs at 60, 144 or 240 Hz
- Gradient & Banding TestCheck colour banding, black and white levels
- Ghosting TestSee motion blur, ghosting and overdrive artefacts
- Input Lag TestEstimate the delay between your input and the screen
- Backlight Bleed TestFind light bleed, IPS glow and uneven brightness
- Monitor CalibrationAdjust brightness, contrast, gamma and colour by eye
- Webcam TestCheck camera image, resolution and frame rate
Audio
Speakers, headphones and microphones · 7 tools
- Speaker TestLeft and right speaker check for stereo
- Microphone TestLive mic level, waveform and noise floor
- Mic RecorderRecord and play back to hear your microphone
- Frequency Sweep20 Hz to 20 kHz sweep and hearing range
- Tone GeneratorPlay any frequency from 1 Hz to 22 kHz
- Surround Sound TestCheck 5.1 and 7.1 speaker channels
- Hearing & Headphone TestCheck which frequencies you and your headphones can reproduce
System & network
Speed, latency, CPU, GPU, storage and battery · 10 tools
- System InfoSee CPU, GPU, memory, screen and browser details
- Ping & Jitter TestMeasure latency, jitter and packet loss
- Internet Speed TestDownload, upload and ping in 25 seconds
- CPU BenchmarkSingle- and multi-thread processor score
- GPU TestWebGL graphics benchmark and GPU details
- Storage Speed TestBrowser storage read/write speed and quota
- Battery TestBattery level, charging status and drain rate
- Browser CheckSee which web features your browser supports
- GPS TestCheck location accuracy and time to first fix
- Printer Test PageColour, black, nozzle and alignment test pages
Fix guides
Step-by-step help for the problems our tests uncover.
- Webcam Not Working? How to Fix a Black or Missing CameraFix a webcam that shows a black screen, is not detected or is blocked in Chrome, Edge, Safari, Zoom or Teams. Permission, privacy and driver fixes.
- Microphone Not Working? Fix No Input, Too Quiet or Not DetectedFix a microphone that is not detected, picks up nothing or is too quiet in Windows, macOS, Chrome, Zoom and Discord. Step-by-step permission and input fixes.
- High Ping and Jitter? How to Reduce Lag SpikesReduce high ping, jitter and packet loss for gaming, Zoom and Teams. Fix Wi-Fi interference, bufferbloat, background downloads and router issues.
- How to check a used laptop before you buy itA practical checklist for buying a used or refurbished laptop: test the screen, keyboard, battery, ports, speakers, camera and performance in 10 minutes, and spot locked or stolen devices.
- No Sound From One Speaker? Fix Left or Right AudioFix sound coming only from the left or right speaker or earbud. Check balance, mono audio, cables and drivers on Windows, macOS, iPhone and Android.
- Dead Pixel vs Stuck Pixel: How to Tell and What to DoLearn the difference between dead and stuck pixels, how to find them with a screen test, when a pixel fixer helps and when to claim warranty.
Why people use these tests
Private by design
Camera, microphone and input data stay in your browser. The page never sends them anywhere.
Instant
No downloads, drivers or accounts. Open a test and you have a result in seconds.
Honest readings
Each tool shows the raw values the browser reports, plus a plain-language verdict.
In your language
Every tool and guide is available in 17 languages, from English and Spanish to Arabic, Japanese and Hindi.
Frequently asked questions
Are these hardware tests private?
Yes. All tests run locally in your browser. Your camera image, microphone audio and test results are never uploaded.
Do I need to install anything?
No. Everything works in a modern browser such as Chrome, Edge, Firefox or Safari on desktop and mobile.
Why do results differ between browsers?
Browsers expose hardware through different interfaces and some limit precision for privacy. Chromium-based browsers usually report the most detail.
Are the tests really free?
Yes. The site is funded by ads and by voluntary support from visitors.