Folder Compare
Compare Two Folders Online

A folder diff tool, also called a directory compare tool or folder comparison tool, scans two folders and shows you which files were added, removed, or changed between them. Modified text files can be opened for a full line-by-line diff, while binary files are compared by size and content hash.

Click or drop to pick your first folder, then do the same for the second. Both folders are walked through in the browser, and the results show up as a merged tree with every file colour-coded by status: green for added, red for removed, amber for modified. Click any modified text file to open its full diff.

Yes, completely free for personal and business use. No sign-up, no daily limit, no paid upgrade, no features held back behind an account. Compare as many folders as you need, up to the size your browser can handle.

Yes. Folder and directory are the same thing in this context. Whether you call it a folder compare or a directory compare, the tool walks through both trees, lines up the files, and shows every added, removed, and modified file in one merged view.

Both. Once the folders are loaded, you can drill into any modified text file for a full line-by-line diff right beside the tree. So it works as a file compare tool and a folder compare tool at the same time, in one page, without an install.

Yes. When you pick a folder, the browser asks for your permission and then reads the files directly from your disk. Nothing is uploaded, no list of your files is kept anywhere, and the permission is gone the moment you close the tab. That's what makes the tool safe for proprietary code, backups, and anything else you'd rather not send to a cloud service.

Every modern browser. Chrome, Edge, Brave, and Arc get direct access to the folder you pick, which is the fastest path. Firefox and Safari use drag-and-drop instead, which works just as well but is a little slower on very large projects.

Everything runs in the browser, with no installation, and works the same on Mac, Windows, and Linux. For everyday folder reviews the output covers the same ground as a desktop tool. Heavy workflows like three-way merge or custom ignore rules are still better suited to a desktop app for now.

Yes. Both folders are read through in the background, so you can start reviewing the early results while the rest of the scan is still running. The practical limit comes from how much memory the browser has to work with, not from the tool itself.

Any text file: source code, config files, Markdown, CSV, JSON, YAML, XML, logs, and so on. Binary files like images, PDFs, and compiled archives are compared by size and hash instead, since a line-by-line diff wouldn't say anything meaningful about them.

Not yet. Today a renamed file shows up as one addition and one deletion. Move and rename detection is on the roadmap, but it isn't in place yet. If catching renames matters a lot for your review, a desktop tool with explicit rename detection is still a better fit.

Yes. Once the page has loaded, everything runs on your own computer, with no server and no network needed. You can disconnect from the internet and keep comparing folders without missing a beat.