Hardware diagnostics · free · in-browser

Free laptop test online.
Every part, checked in ten minutes.

A guided check of the screen, keyboard, touchpad, battery, speakers, mic, webcam and fingerprint reader. Nothing to install, and your results never leave the device.

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Sample report

Example results showing what a full test covers. These are not readings from your device.

How our tests work

Every test runs entirely inside your browser using standard web APIs. Step one: open the tool you need. Step two: grant the browser permission if the test uses your camera, microphone or speakers. Step three: follow the on-screen instructions and read the result, then use the accompanying guidance to work out whether what you saw is a hardware fault, a driver problem, or normal behaviour for that panel or component.

This matters because most hardware faults are intermittent or subtle. A stuck pixel is invisible against a busy desktop but obvious on a solid colour field. A keyboard that drops one key only shows up when you press it deliberately. A battery that has lost a third of its capacity still reports "100%". Structured tests surface these problems in minutes instead of weeks.

Who uses LaptopTestOnline

  • Buyers inspecting a used or refurbished laptop before paying for it.
  • Sellers documenting a device honestly so their listing holds up.
  • Repair technicians running a pre- and post-repair baseline.
  • IT teams spot-checking fleet hardware at refresh time.
  • Owners trying to tell a hardware fault from a software one.

Our testing tools in detail

Screen Test

This free dead pixel test and screen test cycles your display through eight solid-color fields (white, black, and the six primary/secondary hues) so you can spot dead pixels, stuck pixels, uneven backlight, and color-uniformity problems in a matter of seconds. Because the test runs full-screen in your browser, no drivers, no installs, and no permissions are required — it works on Windows laptops, MacBooks, Chromebooks, tablets, and phones alike. Whether you're inspecting a…

Pixel Repair Tool

Stuck pixels are subpixels that are locked on a single color instead of switching correctly — they show up as tiny bright red, green, or blue dots on your display. Unlike truly dead pixels, stuck pixels can often be revived by rapidly flashing the affected area through millions of color transitions, which forces the misbehaving transistor back into normal operation. Our free browser-based Pixel Repair tool automates that process: it flashes a small region of your screen…

Color Gradient Test

The Color Gradient Test displays smooth transitions across the full brightness and hue range so you can spot color banding, posterization, and gamma issues on your display. On a healthy 8-bit or 10-bit panel, the gradient should look like an even, continuous blend from black to white or from one color to another. If you see visible steps, stripes, or sudden brightness jumps, your panel is either dithering poorly or running at a reduced color depth (often 6-bit + FRC on…

Refresh Rate Test

Your monitor's refresh rate is how many times per second it can redraw the image, measured in hertz (Hz). Standard laptops run at 60 Hz, gaming laptops at 120, 144, 165, or 240 Hz, and pro displays as high as 480 Hz. Our free Refresh Rate Test uses the browser's requestAnimationFrame API to measure exactly how many frames your display actually delivers per second — not just what the spec sheet claims. If you paid for a 144 Hz panel but Windows is only outputting 60 Hz, this…

Brightness Test

The Brightness Test steps your display through evenly-spaced luminance levels so you can spot black-crush (loss of detail in dark tones), white clipping (loss of highlight detail), and non-linear brightness curves. It also helps you calibrate a comfortable working brightness for your ambient lighting — one of the biggest causes of eye strain is a display set too bright for the room. The test runs entirely in your browser, requires no colorimeter, and works on any laptop,…

Battery Health & Test

The Battery Health tool reads your laptop's live battery data through the browser's Battery Status API and analyzes charge/discharge trends in real time to estimate battery wear, remaining runtime, and health score. It also includes an optional stress test that spikes CPU load and measures the resulting discharge rate — a much more meaningful indicator of battery capacity than a manufacturer's spec-sheet mAh number. The entire test runs client-side; no data leaves your…

Touch Screen Test

This free online touch screen test checks that every part of your touch panel registers input accurately, tracks multi-finger gestures and responds without lag. It runs entirely in the browser, so it works on touchscreen Windows laptops, 2-in-1s, Chromebooks, iPads, Android tablets and phones with no app or driver install. In two minutes you can confirm that a new device is defect-free, find dead zones and ghost touches on an older screen, or verify a repair before the…

Mouse Test

Our online Mouse Test verifies every button, the scroll wheel, and cursor tracking in seconds. It catches the most common mouse faults — double-click errors, dead scroll wheels, unregistered side buttons, and sensor stutter — without installing anything. Whether you are testing a brand-new gaming mouse, troubleshooting an older office mouse, or verifying a warranty replacement, this test gives you a definitive answer before you spend more money.

Keyboard Test

Our free Keyboard Test highlights every key you press on an on-screen layout so you can instantly verify that every key on your laptop or external keyboard is working. It supports Windows, macOS, and international layouts and catches stuck keys, dead keys, ghosting, and n-key rollover limits without any install.

Fingerprint Scanner Test

Quick answer: to check a fingerprint scanner online, enrol a finger in Windows Hello or Touch ID, click "Start Fingerprint Test" below and touch the sensor. A green Success badge means the biometric scanner read and matched your print. This free fingerprint scanner test works on laptops, desktop PCs with a USB fingerprint reader, and Chromebooks, and it never sees or uploads your fingerprint. The check uses the WebAuthn standard, so all biometric data stays on your device.

Microphone Test

Our online Microphone Test lets you verify your laptop's built-in mic, a USB headset, or an XLR interface without installing anything. You will see a live audio-level meter as you speak, and you can record a short clip and play it back to confirm exactly what your mic sounds like to callers and audiences.

Webcam Test

This free webcam test opens a live preview from any camera connected to your device — built-in laptop camera, USB webcam or virtual camera — so you can check your camera online before a video call. It shows the picture, resolution, frame rate and camera name, so you know exactly what Zoom, Teams or Google Meet will see. Nothing is recorded or uploaded: the video stays in your browser tab.

Sound Test

This free sound test and speaker test plays generated tones through your left and right channels, sweeps across the audible frequency range, and includes a custom frequency generator from 20 Hz to 20 kHz. Use it as a left and right speaker test for laptop speakers, headphones, earbuds or external speakers: confirm both sides work, catch a blown driver, and hear whether bass and treble are still there. Nothing to install, and it works on Windows, Mac, Chromebook, Android and…

Motion Blur Test

This free UFO test and motion blur test moves a high-contrast object across the screen at adjustable speeds so you can judge motion clarity, ghosting, smearing and overdrive overshoot on your monitor or laptop screen. It works on the same principle as the UFO-style tests reviewers use: you track the moving object with your eyes and watch how sharp its edges stay. Run it at 60, 120, 144, 165 or 240 Hz to see what a higher refresh rate really changes.

Screen Resolution Test

Our Resolution Test reports your monitor's current resolution, device pixel ratio, and physical DPI so you can confirm the OS is driving the display at its native panel resolution. Running at non-native resolution causes soft text and blurry UI.

Screen Size Test

Our Screen Size Test measures the diagonal, width, and height of your display in inches and centimetres using the browser's DPI reporting. It is a quick way to confirm the advertised size of a monitor or laptop matches the actual panel.

Text Sharpness Test

Our Text Sharpness Test displays black text on white and white on black in multiple font sizes so you can judge subpixel rendering, anti-aliasing quality, and any softness caused by non-native resolution or aggressive scaling.

Typing Speed Test

Our free online Typing Speed Test measures your typing speed in Words Per Minute (WPM), Gross WPM, accuracy percentage, and Characters Per Minute (CPM) directly in your browser. Whether you are using a laptop scissor-switch keyboard, an external mechanical keyboard, or an office membrane keyboard, this test evaluates both your personal typing dexterity and your keyboard hardware responsiveness. With custom time limits (15s, 30s, 60s, 120s), word count challenges,…

WiFi Speed Test

Our free online WiFi Speed Test measures your real-world internet connection performance directly in your browser. With zero software installs, no third-party browser extensions, and no personal data collected, this tool tests your download speed, upload speed, latency (ping), and jitter against high-speed global edge servers. Whether you are diagnosing slow web browsing on your laptop, checking your 5 GHz vs 2.4 GHz WiFi band performance, troubleshooting bufferbloat before…

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