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KDiff3

KDiff3

Developer:

Reviews
4 / 34
Downloads
41,782
Latest version
1.12.6
Released Jul 22, 2026

Downloads

Downloads are available on KDiff3’s official website.

KDiff3 at a glance

What it is
Compares and merges two or three text files or folders
Open source
Yes
Licence
GPL-2.0-or-later
Made by
Michael Rassokhin
Official website
apps.kde.org/kdiff3
Alternative
WinMerge

Description

KDiff3 is a free, open source and cross-platform tool designed to analyze text differences and merge files or directories. It features support for Unicode, UTF-8, reveals the difference between each character and line, integrates into Windows Explorer; it can print the differences, etc.

It is similar to other apps such as WinMerge and runs on Windows, macOS, and Linux.

KDiff3 Features

KDiff3 is capable of analyzing up to three input files while providing character by character analysis. The software performs auto-detection with BOM byte-order-mark, has a text merge tool and an integrated editor that resolves potential merge conflicts. KDiff3's graphic user interface is quite intuitive. This nuanced software has also been programmed to contrast and merge directories. It can even compare entire directory trees. Differences are displayed line by line as well as character by character. The program can print these differences so you can take a look at them on a tangible piece of paper rather than on-screen. It's a nice amenity for those who have grown tired of staring at the screen for hours on end. Those who are in search of a program that allows for three-way merges will find KDiff3 a good fit.

KDiff3 Review

KDiff3 is a program that analyzes text differences graphically. It supports UTF-8, Unicode and other codecs. Support is also provided for KIO on KDE, permitting access to FTP, sFTP, smb, and fish. KDiff3 is built on the Qt libraries and KDE Frameworks, and it runs on Windows, macOS and Linux.

Why the Software is Worth a Download

KDiff3 is available at no-cost to the user. Go ahead and download this open-source software today and you won't be disappointed. You can compare two files to one another and even modify the merge results with ease. If you are interested in manual code aligning, you can select code in a single window by holding down the control key and simultaneously pressing the “Y” key. Select the additional code in a second window, use the control and Y shortcut again and you will be able to align code manually as desired. Options are also available to pre-process files that the software will eventually compare and contrast.

The Verdict on KDiff3

KDiff3's integrated editor solves merge conflicts with surprising speed and ease. The fact that the software supports a variety of platforms is another point in its favor. In the end, KDiff3 is worth a download and it can be a good alternative to other similar programs such as WinMerge, DiffMerge or Meld.