Got a new monitor, keyboard, or mouse—and something feels off?

Here are the top 5 browser-based tools to test your PC components.

🖥️ 1. XBitLabs — The All-in-One Toolbox

  • Tools: 120+
  • Compatibility: Any modern browser

This has the largest collection on the list—covering mouse, keyboard, display, audio, and more in one place:

  • Keyboard: Tester supporting your actual layout size (Full, TKL, 75%, 65%, 60%, laptop).
  • Mouse: DPI test, polling rate test, and double-click detection.
  • Monitor: Refresh rate, ghosting, and dead pixel checks.
  • Gaming: CPS (clicks per second) test and an aim trainer.

How to use:

  1. Go to xbitlabs.com
  2. Pick a hardware category.
  3. Start the test—results update live.

🧪 2. Test My Gears — Test Your Whole Desk

  • Tools: 50+
  • Languages: 9 supported

If you want your entire setup checked without jumping between ten different tabs, this covers almost every peripheral:

  • Screen: Dead pixel, backlight bleed, ghosting, and flicker tests.
  • Mouse: CPS, DPI, polling rate, click latency, and double-click tests.
  • Keyboard: Full key matrix tester and chatter (double-type) detection.
  • Controller: Stick drift diagnostics for gamepads.
  • Audio: Stereo speaker and surround sound channel tests.

Every test renders live telemetry while you interact with it rather than a basic pass/fail at the end.

How to use:

  1. Go to testmygears.com
  2. Select the device you want to diagnose.
  3. Follow the on-screen prompts and watch the live readout.

⬜ 3. WhiteScreen.dev — One Tool, Zero Clutter

  • Tools: 1 (Fullscreen solid color overlays)
  • Best for: Dead pixels and physical screen cleaning

This site does one job—it fills your entire viewport with a solid color. Most of the time, that is all you need:

  • White screen: Exposes dead pixels, dust, and smudges before you wipe down your panel.
  • Black screen: Reveals backlight bleed and stuck bright pixels.
  • Red / Green / Blue: Isolates individual sub-pixel color channels.
  • Bonus: Doubles as a soft ring-light alternative for video calls.

How to use:

  1. Go to whitescreen.dev
  2. Pick a color.
  3. Press F11 for fullscreen and inspect your panel slowly.

👽 4. TestUFO — The Industry Motion Standard

  • Tools: Motion blur and refresh rate diagnostics
  • Best for: Ghosting and verifying your actual Hz

Run by Blur Busters, this moving UFO benchmark is the standard tool used in professional monitor reviews to check how a display handles motion:

  • UFO Ghosting Test: Visually inspect the overdrive/blur trail behind a moving sprite.
  • Real Refresh Rate: Verifies if your 144Hz+ monitor is actually running at its rated Hz (and not stuck at 60Hz in OS settings).
  • Frame Skipping Test: Detects dropped frames on overclocked panels.
  • Comparisons: Side-by-side frame-rate motion blur previews.

How to use:

  1. Go to testufo.com
  2. The benchmark starts automatically—just track the UFO with your eyes.

⌨️ 5. KeyboardTester — The 10-Second Key Check

  • Tools: 1
  • Best for: Finding a dead or chattering key fast

The simplest utility on this list. Open the page and start typing on your physical keyboard:

  • Every key you press highlights and triggers an audio click on the virtual layout.
  • No highlight = dead switch or broken trace.
  • Double highlight = switch chatter / double-typing defect.

How to use:

  1. Go to keyboardtester.com
  2. Start typing—done.

If you found this useful, bookmark it for your next hardware upgrade—and drop your own favorite browser-based diagnostic tool in the comments.

Follow for more drops like this: free tools, dev hacks, and single-purpose utilities that do one job well. 🔧💻