About LaptopTestOnline

LaptopTestOnline is a free, browser-based hardware diagnostic suite. We build and maintain twelve tools that let anyone verify a laptop's screen, keyboard, camera, microphone, speakers, pointer and battery — without downloading software, creating an account, or sending a single byte of test data to a server.

The site exists to answer one question quickly and honestly: does this laptop's hardware actually work? That question comes up when buying a used machine, selling one, collecting a device from a repair shop, or diagnosing a symptom that might be hardware or might be a driver.

Every test runs locally. Camera and microphone streams are acquired through the browser's getUserMedia API and rendered straight into the page — there is no upload endpoint in the codebase, and results are never stored or transmitted.

Each test is built on a standard web API rather than a plugin. Display tests use canvas rendering and requestAnimationFrame timing; audio tests use the Web Audio API; camera tests use WebRTC device enumeration; the battery tool reads the Battery Status API with a labelled fallback where browsers have removed it. Where a browser cannot expose a value, we say so rather than inventing a number.