Free PC Testing Tools
13 free browser-based tools to test, diagnose, and benchmark your mouse, keyboard, monitor, and audio setup. No downloads, no account, no ads — just instant results.
10+
Free tools
0
Downloads needed
No
Account required
100%
Browser-based
Mouse Tools
5 tools
Reaction Time Test
Measure your gaming reflexes in milliseconds. See how you compare to pro gamers.
Mouse Polling Rate Test
Check your mouse's actual Hz — 125Hz, 500Hz, 1000Hz, or higher.
Mouse Button Tester
Test all mouse buttons including side buttons, scroll click, and DPI button.
Scroll Wheel Tester
Diagnose scroll wheel issues — skipping, double-scroll, wrong direction.
CPS Test
Clicks-per-second test. Measure your click speed across 1s, 5s, and 10s intervals.
Keyboard Tools
3 tools
Keyboard Tester
Test every key on your keyboard. Check for ghosting, stuck keys, and N-key rollover.
Typing Speed Test
Measure your WPM (words per minute) and accuracy with a real typing challenge.
DPI Checker
Test your mouse's actual DPI using a ruler and your browser. No software needed.
Monitor Tools
4 tools
Dead Pixel Test
Full-screen colour tests to find dead, stuck, and hot pixels on any monitor.
Refresh Rate Test
Verify your monitor's actual refresh rate — confirm 144Hz or 240Hz is active.
Monitor Response Test
Observe display ghosting at multiple speeds and estimate your panel's pixel response time.
Aspect Ratio Calculator
Calculate the correct aspect ratio for any resolution or resize images proportionally.
Audio Tools
1 tool
Browse by Problem
My mouse feels laggy
Mouse Polling Rate Test
I want to improve my aim
Reaction Time Test
Keys not registering
Keyboard Tester
Dark spots on my screen
Dead Pixel Test
144Hz not feeling smooth
Refresh Rate Test
Scroll wheel skipping
Scroll Wheel Tester
Mouse clicks not registering
Mouse Button Tester
Headphone channel imbalance
Headphone Test
Want to know my typing speed
Typing Speed Test
Guides to Help You Get the Most from Your Setup
Mouse Polling Rate Explained
Why 1000Hz matters and when to upgrade
Keyboard Ghosting Guide
12 keyboards tested — full rollover data
What Is eDPI?
Pro player database + how to find your ideal sensitivity
Dead vs Stuck Pixels
ISO 13406-2 standards + fix guide
Audio Latency Guide
12 headsets tested — Bluetooth vs wired vs 2.4GHz
N-Key Rollover Explained
NKRO vs 6KRO — what you actually need
Why Browser-Based PC Testing Tools?
Most PC diagnostic software requires installation, admin privileges, or a Windows-only binary. That creates a frustrating gap for users who just want a quick answer: is my keyboard actually registering every keypress? Is my monitor running at 144 Hz or stuck at 60 Hz because of an HDMI cable limitation? Is my mouse polling rate the 1000 Hz the box claims, or has it dropped?
Modern browsers expose a surprising depth of hardware information through standard Web APIs — the KeyboardEvent API identifies every physical key including ghosted simultaneous presses, requestAnimationFrame measures the real display refresh interval, and performance.now() gives sub-millisecond timing precision for reaction tests and polling rate measurements. These APIs work identically across operating systems — Windows, macOS, Linux, and ChromeOS — without a single line of native code.
The trade-off is that browser tests have a ceiling. They can't read GPU temperature sensors, access raw disk I/O, or measure latency below the level of the browser's own rendering pipeline (typically 4–16 ms, depending on the browser and OS scheduler). That's why UltimatePCTools focuses specifically on the measurements where browser accuracy is genuinely sufficient: input device behaviour, display refresh rates, audio channel balance, and pixel-level display diagnostics. For metrics that require kernel-level access, we point you toward the right software tool instead of giving you a number you can't trust.
Browser vs. Software: When to Use Each
| What You Want to Measure | Best Tool |
|---|---|
| Mouse polling rate (Hz) | ✓ UltimatePCTools — Mouse Polling Rate Test |
| Keyboard ghosting / rollover | ✓ UltimatePCTools — Keyboard Tester |
| Reaction time | ✓ UltimatePCTools — Reaction Time Test |
| Monitor refresh rate | ✓ UltimatePCTools — Refresh Rate Test |
| Dead / stuck pixels | ✓ UltimatePCTools — Dead Pixel Test |
| GPU temperature | → HWiNFO64 or MSI Afterburner |
| CPU benchmark (single-core) | → Cinebench R23 or Geekbench |
| Storage read/write speed | → CrystalDiskMark or AS SSD |
| Input lag (end-to-end) | → LDAT or Leo Bodnar device |
Accuracy & Methodology
Every tool on this site includes an explanation of its measurement method and a clear statement of its limitations. We don't show you a number without telling you what it means. The polling rate test explains that results are averaged over two seconds to smooth out OS scheduler jitter. The reaction time test explains that browser rendering adds a fixed offset and that comparisons within the same browser session are valid, while cross-device comparisons should account for display latency differences.
All tools are tested on real hardware before publishing — across multiple mice, keyboards, and monitors — to verify that the methodology produces results consistent with known hardware specifications. If a 1000 Hz gaming mouse doesn't read as 1000 Hz on our polling rate test, we investigate why before publishing.
Test results are generated entirely in your browser and are never sent to a server. Personal-best scores are stored in your browser's local storage and remain on your device only. See the About page for full methodology notes per tool, or the Privacy Policy for data handling details.
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