WinMerge for PC: How to Download and Install on Windows (2026 Guide)

Anyone who works with code, configuration files or document drafts knows the moment: two versions of the same file, and no easy way to see exactly what changed between them. WinMerge solves that in seconds. It is a free, open-source differencing and merging tool for Windows that shows files and folders side by side, highlights every difference in color, and lets you merge the changes you want to keep.

This guide shows you how to download WinMerge for PC from its official website, install it on Windows 11 or 10, and run your first file and folder comparisons. WinMerge is completely free — no trial, no paid edition — so the only thing to get right is downloading the genuine program from the official source.

What Is WinMerge?

WinMerge is an open-source visual diff and merge tool that has been a Windows staple for developers, system administrators and writers for over two decades. Instead of reading two files line by line yourself, you open them in WinMerge and it aligns them in two panes, coloring added, deleted and changed lines so the differences are obvious at a glance. A location pane on the side gives you a map of the whole comparison, and differences inside a single line are highlighted too.

The same idea works for entire folders: WinMerge compares two directories — including all subfolders if you want — and shows which files are identical, which differ, and which exist on only one side. That makes it just as useful for syncing a backup folder or checking a project copy as it is for reviewing code. It also integrates with version control workflows and can be set as the diff and merge tool for Git.

Key Features

Visual file comparison: Two files side by side with color-coded differences, differences inside lines highlighted, and moved-line detection.
Folder comparison and sync: Compare whole folders recursively, see identical, changed and unique files, and copy files between sides to sync them.
Three-way comparison: Open three files at once to resolve merge conflicts — ideal for Git and other version control systems.
Image comparison: Compare image files visually with difference highlighting, overlay and blending modes.
Table comparison: CSV and TSV files are shown as aligned tables, making spreadsheet-style data easy to compare cell by cell.
Windows shell integration: Right-click files or folders in Explorer and send them straight into a WinMerge comparison.
Archive and patch support: Open archive files such as ZIP and 7z for comparison (via 7-Zip), and create patch files in Normal, Context and Unified formats.

System Requirements

Operating System: Windows 11, Windows 10, Windows 8 or Windows 7 (64-bit build needs Windows 7 or later)
Processor: Any modern Intel or AMD CPU, 1 GHz or faster
RAM: 2 GB minimum; 4 GB recommended for very large folder comparisons
Storage: Around 50 MB free space for the program
Display: 1024×768 or higher
Administrator Rights: Needed for the standard installer; a per-user installer is available if you do not have admin rights
Internet: Required only for the download from the official website

How to Download WinMerge (Official Method)

WinMerge is free and open source, and the project’s genuine Windows installer is published only on the official WinMerge website. Download portals and repackaged copies are an unnecessary risk — the official site offers the installer, a per-user installer, an ARM64 build and a portable ZIP, all with SHA-256 checksums you can verify. Always take WinMerge from the official downloads page below.

Official Website: Download WinMerge from the official website

Step-by-Step Installation

Open the official WinMerge downloads page linked above.
Choose the 64-bit installer (WinMerge-x64-Setup.exe) — the right choice for almost all modern PCs.
Save the setup file to your Downloads folder.
Double-click the installer and click Yes on the Windows administrator prompt.
Accept the GNU GPL license agreement and keep the default installation folder.
On the components screen, keep Shell Integration selected so WinMerge appears in the Explorer right-click menu, then click Next.
Click Install, then Finish, and launch WinMerge from the Start menu.

Tip: If you cannot install software on a work PC, download the portable ZIP from the same page instead — WinMerge runs straight from the extracted folder with no installation at all.

How to Compare Your First Files in WinMerge

Open WinMerge and choose File > Open.
In the first field, pick the older file (or folder); in the second field, pick the newer one.
Click Compare — the two files open side by side with every difference colored.
Press Alt+Down and Alt+Up to jump between differences one by one.
To merge a change, click a difference and use the copy buttons (Alt+Right or Alt+Left) to move the text you want to keep into the other pane.
Save the merged file with Ctrl+S, then close the tab — your comparison is done.

Is WinMerge Free? The Open-Source Terms Explained

Yes — WinMerge is 100% free and open source, released under the GNU General Public License (GPL). You can download it, use it at home or at work, and even use it commercially without paying anything. There is no premium version, no license key and no feature locked behind a payment; the program on the official site is the complete program.

The project is maintained by volunteers and funded by donations, which are entirely optional. If a website asks you to pay for WinMerge or to install a “download manager” first, close it — the genuine software is always free from winmerge.org.

Frequently Asked Questions

Is WinMerge safe to download?
Yes — as long as you download it only from the official website, winmerge.org. WinMerge is a long-running open-source project whose source code is public, and the official downloads page publishes SHA-256 checksums so you can verify your installer. Avoid third-party download portals, which may bundle unwanted extras with the program.

Can I use WinMerge for free at work?
Yes. The GPL license allows personal, workplace and commercial use at no cost. There is no separate business edition and nothing to activate.

Can WinMerge compare folders as well as files?
Yes. Folder comparison is one of its core strengths: it compares directories recursively, classifies files as identical, different or one-sided, and lets you copy files between the two sides to bring folders into sync.

Can WinMerge work with Git?
Yes. You can configure WinMerge as Git’s difftool and mergetool by pointing Git to WinMergeU.exe in your .gitconfig, after which Git opens visual comparisons and merge conflicts in WinMerge instead of plain text.

Conclusion

WinMerge is the classic free answer to “what changed between these two files?” — fast visual comparison and merging for files, folders, images and tables, with no cost and no restrictions. Download it from the official website, turn on the shell integration during setup, and your next comparison will take seconds instead of squinting.

Download WinMerge from the Official Website

WinMerge for PC: How to Download and Install on Windows (2026 Guide)