Your files are read in your browser and nowhere else.
- No uploads. The page's security policy blocks it from sending data anywhere: it can only load its own files from this site.
- No storage. Nothing is written to your browser's storage or to a server. Closing or reloading the tab clears the files.
- No account, no cookies, no analytics.
- Exports are created in your browser and saved straight to your device.
- The hosting provider (Microsoft Azure) receives the usual request information, such as IP address and browser, when the page loads, as any website's host does. It never receives your files.
The code that reads and compares files is open source.