--- {"type":"list","title":"5 Free Online Tools for Testing and Diagnosing Computer Hardware Issues","listId":144247,"canonicalUrl":"https://listium.com/@markdev/144247/5-free-online-tools-for-testing-and-diagnosing-computer-hardware-issues","visibleItemTotal":5,"creator":{"id":"markdev","name":"Mark","url":"https://listium.com/@markdev"},"stats":{"views":499,"likes":0,"followers":0},"category":"technology & computing / hardware","publishedAt":"2026-06-13T11:21:19.675Z","updatedAt":"2026-06-13T11:22:50.963Z","fields":[{"id":0,"name":"Name","type":"PrimaryText"},{"id":7,"name":"About","type":"Text","format":"long"},{"id":8,"name":"Link","type":"URL"}]} --- # 5 Free Online Tools for Testing and Diagnosing Computer Hardware Issues By [Mark (@markdev)](https://listium.com/@markdev) 499 views · 0 likes · 0 followers Published 13 June 2026 · Updated 13 June 2026 Category: technology & computing / hardware A curated collection of free online tools that help you quickly test and diagnose common computer hardware issues without installing any software. These tools are useful for troubleshooting mice, keyboards, displays, and system performance before deciding to replace or repair hardware. ## Items ### 1. [Mouse Double Click Test](https://listium.com/@markdev/144247/5-free-online-tools-for-testing-and-diagnosing-computer-hardware-issues/1/mouse-double-click-test) Item ID: `1` - About: A simple online tool to check whether your mouse is registering unintended double clicks. Helps identify worn or faulty mouse switches quickly with a clear result. - Link: [https://mousedoubleclicktest.com/](https://mousedoubleclicktest.com/) ### 2. [Keyboard Tester](https://listium.com/@markdev/144247/5-free-online-tools-for-testing-and-diagnosing-computer-hardware-issues/2/keyboard-tester) Item ID: `2` - About: A web-based keyboard testing tool that lets you check if all keys are working properly and responding correctly in real time. - Link: [https://keyboardchecker.com/](https://keyboardchecker.com/) ### 3. [CPU/GPU Stress Test](https://listium.com/@markdev/144247/5-free-online-tools-for-testing-and-diagnosing-computer-hardware-issues/4/cpugpu-stress-test) Item ID: `4` - About: A hardware stability testing tool used to check CPU and GPU performance under load and detect overheating or instability issues. - Link: - ### 4. [Dead Pixel Test](https://listium.com/@markdev/144247/5-free-online-tools-for-testing-and-diagnosing-computer-hardware-issues/3/dead-pixel-test) Item ID: `3` - About: A monitor testing tool used to detect dead pixels, stuck pixels, and display issues on LCD and LED screens. - Link: [https://www.jscreenfix.com/screen.html](https://www.jscreenfix.com/screen.html) ### 5. [Internet Speed Test](https://listium.com/@markdev/144247/5-free-online-tools-for-testing-and-diagnosing-computer-hardware-issues/5/internet-speed-test) Item ID: `5` - About: A widely used tool to measure download speed, upload speed, and ping to diagnose network performance issues. - Link: [https://www.speedtest.net](https://www.speedtest.net)