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 ride along in the URL itself — share the link, share the exact setup. Address bar, not server. The service worker caches the site's files for offline use. No cookies.
Aggregate, page counts with no cookies attached — no cookies, no fingerprinting, no personal identifiers. We know a page was visited; we don't know by whom.
Fontshare-style casting here: Google Fonts supplies the type (your browser fetches it, Google sees the request), Cloudflare Pages plays host with the usual access logs. Neither receives audio, presets, or results — those never leave your device.
Anything unclear? Write to us. Privacy mail gets answered first.