Privacy

Last updated 20 August 2026. The short version: your files are yours. mp3fy is built so that in the normal case we never receive them at all.

Converting on your device (the default)

Most files are converted inside your browser. The file is read locally, the MP3 is written to your browser’s private storage, and nothing is uploaded anywhere. Finished MP3s stay in your browser’s storage for up to 7 days (the History view) so you can save them again; you can remove them at any time with “Clear history”, and clearing your browser’s site data removes everything.

Converting in the cloud (only when you choose it)

Some formats can’t be decoded by browsers. For those, mp3fy offers a cloud conversion that only runs when you press the button. When you do:

• Your file is uploaded over an encrypted connection to storage we rent from Cloudflare, converted by our software, and the upload is deleted immediately after the conversion finishes(or fails).
• The resulting MP3 is deleted one hour after you first download it, and after 24 hours at the latest, whether you downloaded it or not.
• Nobody looks at your files. They are processed entirely by machines.
• Before a cloud job starts, Cloudflare Turnstile runs a quick bot check in your browser (that is the only reason a Cloudflare challenge script loads).

What we keep

For cloud conversions we keep anonymous job statistics: file sizes, audio duration, format and codec names, timings and the outcome. No filenames, no file contents, no IP addresses, no identifiers — there are no user accounts to attach anything to. Device conversions never reach us, so there is nothing to keep.

Cookies and third parties

• mp3fy sets no tracking cookies and shows no ads. We measure traffic with Cloudflare Web Analytics, which is cookieless and anonymous — no fingerprinting, no cross-site tracking, no individual profiles.
• The site runs on Cloudflare, which may set strictly functional security cookies (for example during a Turnstile check) and sees traffic metadata like any host does.
• Background photographs come from Unsplash, served through our own cache — your browser never talks to Unsplash.
• If you donate, the payment form is provided by Donorbox and loads only on the donate page or after a finished conversion; your payment details go to Donorbox and its payment processors, never to us. See Donorbox’s privacy policy.

Questions

Email contact@mp3fy.com.