Privacy

Last updated: July 2026

Your text never leaves your browser

The text and files you compare are processed locally by a WebAssembly module. Their contents are not sent to diff.wtf or any third-party service. Your comparison text and generated diff remain in page memory only and are discarded when you close the tab.

Site data

We do not run client-side analytics or set analytics cookies. The whole site, fonts included, is served by our hosting provider (Cloudflare); loading it contacts no other hosts. Like any hosted website, Cloudflare may process ordinary request metadata such as your IP address, browser information, and requested page. Cloudflare may also collect network-error reports that your browser sends to a.nel.cloudflare.com when a page fails to load. Your diff content is not included in any of those requests.

Local preferences

We store your Split/Unified and Word/Character preferences in local browser storage. Your comparison text is not stored there.

Advertising

diff.wtf does not currently display advertising, and no advertising code runs on the diff tool. We will update this policy before that changes.

Questions

Email privacy@diff.wtf, or read the source — the diff engine is open source, so you don't have to take our word for any of this.