This site is static files. There is no backend, no database, and no account system — so there is nowhere for your data to go, and it doesn't.
Tones are synthesized in your browser with the Web Audio API. The speaker check and the spectrum analyzer use your microphone only while running, feed it into a live meter, and stop; nothing is recorded or transmitted. WAV exports are rendered on your device and go straight to your downloads folder — we never see them.
Named presets live in your browser's localStorage — on your machine, readable by this site only, deletable by clearing site data. Tool settings are encoded in the page URL so links are shareable; that's in your address bar, not on a server. The service worker caches the site's files for offline use. No cookies.
Aggregate, privacy-friendly page counts — no cookies, no fingerprinting, no personal identifiers. We know a page was visited; we don't know by whom.
Fonts come from Google Fonts (your browser requests them from Google, which sees your IP in that request, as with any CDN). Hosting is Cloudflare Pages, which serves the files and keeps standard request logs. Neither receives audio, presets, or results — those never leave your device.
Anything unclear? Write to us. Privacy mail gets answered first.