Check a backup, a copy on a USB drive or two versions of a project. Choose folder A (original) and folder B (copy) and see every file that differs — nothing is uploaded.
Your files never leave your device
Download an Excel report of all files with sizes and dates, or a ZIP with the new and changed files from folder B — ready to copy over folder A to bring it up to date.
No. Both folders are read and compared in your browser.
Thousands of files work fine. Content mode reads files with the same size on both sides, so very large folders take longer.
No. It only reads the folders; you decide what to do with the report or the ZIP.
A file that only exists on one side under its path, but whose exact content exists on the other side under another path.
In content mode, the contents differ even if the date is the same. Choose content mode for an exact answer.
Yes, by default (Thumbs.db, .DS_Store and similar). Untick the option to include them.