No accounts, no analytics, no server-side code. Everything on this site runs in your browser, and nothing you type is sent anywhere.
What happens to what you type
Every tool on ffmpeg.party is plain JavaScript that runs on your device. Filenames, paths, settings and anything else you enter into a form are used only to assemble the command shown on the page. None of it is transmitted to this site or to anyone else, and the author has no way to see it.
For convenience, tools remember your inputs in your browser's sessionStorage so they survive a page reload. That data stays on your device, is scoped to this site, and disappears when you close the tab or clear site data. Each tool also has a reset button.
Tracking
There is none. No analytics, no cookies, no fingerprinting, no advertising, no embedded social widgets.
Third-party requests
Fonts and scripts are served from this site's own domain, so loading a page makes no requests to any third party. Links to external sites (documentation, source repositories and so on) are ordinary links; nothing loads from them until you click.
Hosting
The site is a static build hosted on GitHub Pages. GitHub's servers see the usual connection metadata for any web request (IP address, user agent, requested URL); this is covered by GitHub's privacy statement. The site itself has no server logs of its own and no access to GitHub's.
Verifying this
The complete source is on GitHub, so all of the above can be checked rather than taken on trust. Questions or corrections are welcome via the issue tracker.