Introduction to WinMerge - WinMerge 2.16 Manual (2024)

Introduction to WinMerge

WinMerge is an Open Source differencing and merging tool for Windows. WinMerge can compare two or three folders and files, presenting differences in a visual text format that is easy to understand and handle.

WinMerge is highly useful for determining what has changed between project versions, and then merging changes between versions. WinMerge can be used as an external differencing/merging tool or as a standalone application.

In addition, WinMerge has many helpful supporting features that make comparing, synchronising, and merging as easy and useful as possible. Several programming languages and other file formats are syntax-highlighted.

WinMerge is not a hex editor. WinMerge can show binary files contents and differences between them. But the information is meant for viewing only: editing binary files with WinMerge can break the files.

The goal of WinMerge development is to make comparing, synchronizing, and merging folders and files easy and fast, while maintaining maximum reliability. Ease of use is of key importance for reducing errors.

The latest version 2.16 is considered a stable and reliable program to use.

Note

WinMerge is not freeware (as many sites on the Web have stated): It is GPL licensed.

We provide you with a good tool for free, so please honor your license agreement and submit improvements to us. We are happy to get help improving WinMerge, to the advantage of all WinMerge users.

1.WinMerge versions

There are two kind of versions available in the downloads page.

1.1.Stable versions

Stable versions are recommended for most users. If you are unsure about what version to use, use the latest stable version. Stable versions have an even last number, for example, 2.14.0, 2.16.2 and 2.16.4.

1.2.Beta versions

Beta versions are for people who want to test latest features and improvements made after last stable version. Beta versions are not tested as extensively as stable versions and probably have some bugs. Beta versions have an odd last number, for example 2.16.3 and 2.16.5. Beta versions can be used in production, because they are not expected to have major bugs. But there is always a risk with using beta-level releases, so consider it carefully. We have tried to release a new stable series once a year, so it may be worth waiting for few months for the next stable release...

2.Getting support and reporting bugs

The Discussion forums are the fastest way to get help:

If you find a bug, please submit it as a bug report. Please attach as much information as you can: at a minimum, the version number of WinMerge that you are using. If you can, also attach a configuration log which, you can display by clicking HelpConfiguration in the WinMerge window. Good information in a bug report makes it more likely that your bug will be fixed quickly.

Important

Include the version number in bug reports. You can check the version number by clicking HelpAbout WinMerge.

3.WinMerge source code and development

WinMerge source code is available on our website and from the GitHub project pages. Anyone can download the sources, study them, and alter them. If you find (and fix) bugs, improve something, and so on, please submit your changes to us as patches or pull requests and help improve this product! If you publish your altered version, you are required to publish the changes to source code too. This is what the GPL license is about: please respect it.

WinMerge development work is done by people in their spare time. Nobody gets paid for improving WinMerge. We try to fix bugs as we find them or when somebody reports them to us. We really try - we use WinMerge too. But there are absolutely no promises for new features. We always appreciate any help with WinMerge, be it testing, documenting, translating, or coding.

Introduction to WinMerge - WinMerge 2.16 Manual (2024)

FAQs

How do I reset my WinMerge settings? ›

To restore the default settings, uninstall and re-install WinMerge.

Is WinMerge any good? ›

"WinMerge is an excellent, free, open-source file merging tool for Windows." "For all my needs, it met perfectly. Even though it is a free tool, it works very well." "I have been using it for many years and do not think about replacing it, it is very useful."

How to run WinMerge from command line? ›

1. Using the command-line interface (CLI)
  1. A batch file can launch WinMerge and enable users to specify parameters interactively: start "WinMerge" /B "C:\Program Files\WinMerge\WinMergeU.exe" /e /s /u /dl %3 /dr %5 %6 %7.
  2. The Subversion client allows you to call an external diff program and pass parameters, like this:

How do I ignore line endings in WinMerge? ›

By default, WinMerge compares line ending styles. To disable it, click Edit → Options. In the Compare page, enable (check) the option, Ignore carriage return differences.

What is reset configuration? ›

Use the RESET CONFIGURATION command to undo all configuration changes that have been issued since the domain configuration was activated.

Can you compare Excel files in WinMerge? ›

Winmerge with its xDocDiff plugin lets you compare Excel and Word files. This blog tells you how to setup Visual Studio for using WinMerge for compare. You could simply enable xdocdiff plugin in WinMerge. This way, you will also be able to use all file types that xdocdiff supports.

Does WinMerge work on Windows 10? ›

WinMerge 2.16. 8 (64 bit) supports Windows 7 and later. It runs on 64 bit Windows.

What is the best tool to compare files in Windows? ›

File and Document Comparison Tools
  • Kaleidoscope. Kaleidoscope lets you compare text documents (including source code) and images. ...
  • Litera Compare. Litera Compare accurately detects changes across any two documents in seconds. ...
  • GlobalVision. ...
  • ExamDiff. ...
  • Diff Doc. ...
  • Compare Suite. ...
  • WinMerge. ...
  • Araxis Merge.
Jun 21, 2023

Can WinMerge compare files? ›

You can start a file compare operation from either the WinMerge window or a Command Prompt window. Click File → Open. Use the Select Files or Folders dialog to specify the left and right source files to compare. For more details about the Select Files or Folder dialog, see Opening files and folders.

How do I compare two folders in WinMerge? ›

With the two folders selected, right-click and choose Compare (or click Merge → Compare in the menu).

How do you fix inconsistent line endings? ›

When you copy paste something from web, you might get the inconsistent line endings. In order to fix this, you can use Visual studio extension "Line Endings Unifier" which can make line ending consistent automatically while saving file.

What is the include filter in WinMerge? ›

Remember WinMerge filter of "include" means "Inclusive (loose) filter lets through all items not matching rules".

How do I disable CRLF? ›

Go to the config file in this directory:
  1. C:\ProgramData\Git\config.
  2. Open up the config file in Notepad++ (or whatever text editor you prefer)
  3. Change "autocrlf=" to false.
Feb 17, 2014

How do I resolve conflict in WinMerge? ›

5.3. Resolving conflict files
  1. Click File → Open Conflict File, and use the Open dialog to select the conflict file in your file system. ...
  2. Use all the normal compare and merge functions described earlier in this topic to resolve the conflicts in the Mine File pane.

How do you expand all subfolders in WinMerge? ›

To expand or collapse all folders in the view, click View → Expand All Subfolders or View → Collapse All Subfolders in the menu.

How do I enable tree mode in WinMerge? ›

For me solution was to add the command line option /r (include subfolders), then tree view is enabled from the start. In the initial Select Files or Folders dialog, make sure you check the Include Subfolders check-box.

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