A free Windows tool that measures how evenly your mouse's input actually arrives at your PC — and is honest about what that means.
AleksMouseTester is an independent tool — not affiliated with the older "MouseTester" desktop app by microe1. It was renamed (from "MouseTester") specifically to make that distinction clear and avoid any confusion.
Most mouse testers show you a polling-rate number. AleksMouseTester measures something different and more useful: the timing of how raw mouse input is delivered to the Windows host — how steady the intervals are, how often there are gaps or stutters, and which of your settings actually deliver cleanly on your machine.
Honest by design. AleksMouseTester reports Windows host raw-input delivery timing — not physical USB/HID polling rate, not click-to-photon latency, not a verdict on your hardware. Results are correlations on your own PC, not proof of causation. When a measurement isn't trustworthy, the tool says so instead of glowing green.
- Quick Test — move the mouse for a few seconds, get a plain-language delivery score.
- Advanced / Lab — the full metric breakdown (jitter, worst gap, stutters, batching, on-target share…), a live interval graph (double-click it for a full-screen view with zoom + labeled axes; Esc closes), and the raw numbers behind the score.
- Compare — every run is saved locally and ranked, so you can find your sweet spot: the highest rate that still delivers cleanly (higher Hz isn't automatically better). Double-click any run to reopen it — its values, ratings, and graphs. Testing several USB ports? Compare them side by side.
- Power-saving check — optionally scan the Windows power-saving settings that can interrupt input delivery (USB selective suspend, CPU states, per-device USB power management) and switch them to max performance — fully reversible.
It doesn't reward the highest nominal polling rate. It rewards the highest rate that stays stable under real host delivery.
An 8000 Hz mouse that delivers raggedly can score below a rock-steady 4000 Hz run — and AleksMouseTester shows you why, with the numbers.
- Grab the latest
AleksMouseTester-vX.Y.Z-win-x64.zipfrom Releases. - Unzip (keep the whole folder) and run
AleksMouseTester.exe. - Windows 10/11, 64-bit. Self-contained — no .NET install needed.
Verify your download against the SHA256 value listed on the release.
On first run, Windows SmartScreen may say "Windows protected your PC" — because this is a small, free, unsigned tool, not because it's malware. Click More info → Run anyway. (See Is it safe? below for why, and how to verify it yourself.)
Short version: yes — and you don't have to take my word for it.
- Why the SmartScreen warning? AleksMouseTester is a free tool I don't earn anything from, so it isn't code-signed (a signing certificate costs money and needs a registered company — not worth it for a free project). Unsigned ≠ unsafe — it only means Windows doesn't recognise the publisher yet. The warning fades as more people run it.
- No network, no telemetry. It reads raw mouse input locally to measure timing — nothing leaves your PC, no internet calls, no tracking. Test history is stored only in your Documents folder.
- The optional power-saving changes require admin (a UAC prompt), are shown to you first, and are fully reversible ("Restore settings"). Nothing changes unless you click.
Don't trust me — verify:
- Check the download's SHA256 matches the release — it confirms you got my exact, untampered file (for what the hash can't prove, see How this was built).
- Drag the
.ziponto VirusTotal to scan it with 70+ antivirus engines yourself. - Block it in a firewall if you like — it never needs the internet.
- AI-assisted. I designed and directed AleksMouseTester — the measurement methodology, the "honest instrument" rules, what to measure and how to score it — and wrote the code with heavy help from an AI coding assistant. The design and testing decisions are mine; much of the code is AI-written. Saying so plainly because you deserve to know.
- Closed-source, by choice. This repo is binary-only (README, license, notes, download). The source stays private for now — a deliberate choice, but honestly it limits independent verification: you can't read or rebuild the code.
- What the SHA-256 does and doesn't prove. It only confirms your download matches the file I uploaded — it does not prove the program is safe, and without source you can't diff it against reviewable code. Treat it as "you got the right, untampered bytes," not "it's been audited."
- No git commit history here because the repo is binary-only (the source history lives in a private repo). An empty-looking repo can read as sketchy — hence this section.
So the strongest checks you have are the ones under Is it safe? above — scan it on VirusTotal, run it offline/firewalled, and note it makes no network calls and has no telemetry. Prefer open source or a signed build? Fair — both are on the list as the project earns trust.
Early, pre-1.0. Internally credible, but not yet validated across many mice / PCs — that's the next step. Feedback and measurements from different hardware are very welcome.
Free to use. Binary-only release — see LICENSE. Not open source.
AleksMouseTester is a diagnostic instrument for host input-delivery timing — not a marketing-number generator.