Purpose
The site exists to make browser input visible and explainable. Its tools help a user reproduce a scrolling symptom, a developer inspect standard event fields, or a support conversation distinguish application behavior from a broader input pattern. Every tool starts only after an explicit action and captures only inside its labeled target. Results use cautious language because a browser sees processed events rather than internal hardware.
No laboratory, repair shop, certification program, large team, user count, or accuracy rate is claimed. ScrollWheelTest.org is an independent educational utility. Its product choices favor clear metrics, reproducible steps, accessible controls, and links between a result and the most relevant next check.
Local processing and privacy
The testing components calculate wheel samples and middle-button results in the browser and do not submit their in-memory result objects to a site API. The site has no account or advertising slot, but it uses Microsoft Clarity and Google Analytics to measure page usage and interactions. Exports are generated locally and omit screen coordinates and identity fields. Theme and language preferences may be stored in localStorage. Speed history is stored only when its explicit option is enabled.
This design does not mean a browser page can see everything about a mouse. The site does not request device identifiers, physical encoder data, firmware measurements, DPI, or polling rate. The Privacy Policy lists the actual storage keys and should be updated if the implementation changes.
Technical and editorial boundaries
Content is written around standard browser events and practical troubleshooting. Terms such as anomaly, reverse signal, jitter candidate, and repeat candidate describe the current event sequence only. They do not establish damage, a cause, product quality, warranty status, or a need to buy equipment. Safety guidance stops at external, powered-off checks and directs users to manufacturer instructions or qualified service when disassembly is involved.
Pages are maintained as distinct resources instead of keyword-swapped copies. Updates should keep English and Bahasa Indonesia equivalent in meaning, preserve canonical and alternate links, verify the algorithms with fixed samples, and run content similarity checks. Corrections and accessibility feedback can be sent through the Contact page after a real address is configured.
How the project is maintained
These browser tools are reviewed against visible behavior: when collection starts, where listeners apply, which fields are retained, how thresholds are defined, and whether legal text remains accurate. Unit tests cover calibration, statistics, detection rules, export escaping, and storage validation. Component and browser tests cover start, pause, reset, route localization, metadata, and bounded logs.
The guiding principle behind the browser tools is to report what the browser received, state what it cannot establish, and help users make the next comparison safely. Changes to server processing, analytics configuration, cookies, or third-party processing require the implementation and policy to be reviewed together rather than relying on a generic promise.