The pitch detector, mic test, and every other tool here process audio with the Web Audio API inside your browser. Microphone input and uploaded files are analyzed on your device and discarded from memory when you leave. Nothing is recorded, nothing is stored, and no audio data is ever transmitted to us or anyone else. There is no server that could receive it — this site is static files.
The service worker caches the site's files so it works offline — that's content, not data about you. Some tools keep your settings (like the A4 calibration) in the page URL so links are shareable; that stays in your address bar unless you share it. We set no cookies.
Aggregate, privacy-friendly page counts (how many visits a page got), with no cookies, no fingerprinting, and no personal identifiers. We can see that pages were visited, not who visited them. That's the whole list.
Fonts load from Google Fonts, which means your browser requests font files from Google's servers and Google sees your IP address in that request, as with any CDN. The site is hosted on Cloudflare Pages, which serves the files and sees standard request logs. Neither receives any audio or tool data — there is none to receive.
Microphone access is requested only when you press a start button, is used only while the tool runs, and is released when you stop. You can revoke it any time from the padlock menu in your browser. The tools detect a revoked permission and stop cleanly.
Something unclear, or something we should do better? Contact us — privacy questions get answered first.