28+ free tools to test your keyboard, mouse, monitor, headphones, and PC performance — entirely in your browser. No downloads, no signups, no ads.
| Category | Best Tool to Start |
|---|---|
| ⚡ Reflexes | Reaction Time Test |
| ⌨️ Keyboard | Keyboard Tester |
| 🖱️ Mouse | Mouse Button Tester |
| 🖥️ Display | Dead Pixel Test |
| 🎧 Audio | Headphone Test |
| 🔢 Calculators | Aspect Ratio Calculator |
| Tool | Description | Links |
|---|---|---|
| Reaction Time Test | Measure reflex speed in ms. Click when the screen turns green. Average: 250ms. | Open · Click · Keyboard · Color · Gaming |
| Keyboard Tester | Test every key for ghosting, NKRO, and switch actuation. | Open · Mac · Windows · Laptop · Mechanical · Gaming · Numpad |
| CPS Test (Click Speed) | Measure clicks per second. Test your clicking speed. | Open · 5s · 10s · 30s · 60s · Jitter · Butterfly |
| Spacebar Clicker | Test spacebar tapping speed with timing variants. | Open · 5s · 10s · 30s · 60s · Challenge |
| Mouse Button Tester | Verify all mouse buttons, scroll wheel, and side buttons. | Open |
| Mouse Polling Rate Test | Check your mouse polling rate in Hz (125Hz–8000Hz). | Open · 500Hz · 1000Hz · 4000Hz · 8000Hz |
| Scroll Wheel Tester | Test scroll wheel smoothness, steps, and button. | Open |
| Typing Speed Test | Measure WPM, accuracy, and keystroke timing. | Open · 30s · 1m · 2m · 5m · Numbers · Code |
| Tool | Description | Links |
|---|---|---|
| Dead Pixel Test | Scan your screen for stuck/dead pixels across solid colors. | Open · Black · White · Red · Green · Blue |
| Refresh Rate Test | Detect your monitor's actual refresh rate (60Hz–360Hz+). | Open · 60Hz · 144Hz · 165Hz · 240Hz · 360Hz |
| Aspect Ratio Calculator | Calculate dimensions for any resolution or crop ratio. | Open |
| Tool | Description | Links |
|---|---|---|
| Headphone Test | Test left/right channel balance, bass, treble, and stereo imaging. | Open · Bass · Treble · Stereo · Earbuds |
| Tool | Description | Links |
|---|---|---|
| eDPI Calculator | Calculate effective dots per inch from DPI and in-game sensitivity. | Open |
| Sensitivity Converter | Convert sensitivity between games (CS2, Valorant, Overwatch, Apex, etc.). | Open |
| PSU Calculator | Estimate power supply wattage for your PC build. | Open |
| Bottleneck Calculator | Check CPU/GPU bottleneck percentage for your gaming rig. | Open |
22 in-depth articles covering PC hardware diagnostics and gaming performance:
- ⚡ Instant — All tools run entirely in your browser. No server round-trips.
- 🔒 Private — No data leaves your device. No accounts, no tracking.
- 📱 Cross-platform — Works on Windows, Mac, Linux, iOS, and Android.
- 🆓 Free — No paywalls, no download required, no signup.
- 🧪 Accurate — Browser-optimized measurements with minimal overhead (1–5ms).
The site is built as a fully static Next.js app deployed on Cloudflare Pages:
- Next.js 15 (App Router, static export)
- React 19
- TypeScript 5
- Tailwind CSS 3
- Vitest + Testing Library
- Cloudflare Pages
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