About DeviceKit

DeviceKit.app is a free, privacy-first toolkit for testing your screen and devices directly in your browser — built by people who actually use these tools every day.

Why We Built DeviceKit

It started with a simple problem: we bought a new monitor and needed to check it for dead pixels before the return window closed. The tools we found online were either buried in ads, required installing sketchy software, or uploaded our data to unknown servers.

We thought — this should be easier. A simple, private tool that runs in the browser and actually works. So we built one. Then we built another for backlight bleed. Then keyboard testing. Then mouse, webcam, microphone, speakers, controllers…

Today, DeviceKit is a comprehensive suite of 50+ diagnostic tools across six categories — used by thousands of people every month to verify their hardware works correctly.

Our Mission

Make hardware diagnostics free, private, and accessible to everyone — from someone buying their first laptop to an IT professional testing a fleet of workstations.

What We Cover

Display Tests

27 tools

Dead pixels, backlight bleed, uniformity, color accuracy, refresh rate, and more.

Input Tests

9 tools

Keyboard, mouse buttons, scroll wheel, double-click, touchscreen, and stylus.

Audio Tests

7 tools

Microphone, speakers, left/right channels, frequency response, and playback.

More

10+ tools

Webcam, camera resolution, gamepad buttons, stick drift, vibration, and device info.

How We're Different

Privacy First

All tests run locally in your browser. Camera, microphone, and input data never leave your device. We don't fingerprint you, we don't track your keystrokes, and we don't upload your webcam feed.

Instant — No Downloads

Every tool works immediately in your browser. No software to install, no Chrome extension to add, no APK to sideload. Open the page, run the test.

Transparent & Ad-Honest

We're upfront about how the site is funded. We may show ads to keep DeviceKit free. But we'll never put a fake 'Download' button next to a real one, or hide tools behind a paywall.

Who Uses DeviceKit

  • Everyday buyers — checking a new monitor, laptop, or phone for defects before the return window closes.
  • Gamers — testing refresh rate, response time, controller stick drift, and keyboard ghosting.
  • Remote workers — verifying webcam and microphone quality before an important meeting.
  • IT professionals — running quick diagnostics on workstations without installing software.
  • Content creators — checking audio levels, camera resolution, and color accuracy.

Start Testing

Jump into any test — no signup, no download.

Browse All ToolsRead Our Guides

Get in Touch

Have feedback, a bug report, or a tool you'd like us to build? Reach out at [email protected]. We read every message.