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Diffinity
What it is
Diffinity is a free Windows utility for comparing and merging text files, with folder comparison also available. It presents differences line by line, highlighting changed characters or words and marking lines that were added, removed, or changed. A thumbnail view gives an overview, and search can highlight occurrences of a selected word. The maker emphasizes readable source-code comparisons, including improved diffing for C-style code and XML. Editing and review options include syntax highlighting, customizable tabs, manual alignment markers, and inline diffs that update as text is edited. Diffinity supports Unicode, detects encoding automatically, and warns if the compared files use different encodings. It integrates with Windows Explorer, can run from an external device, and accepts file or folder paths and command-line options. Its documentation describes configuring it as a diff tool for Git and Perforce Helix P4V. The listed release is version 0.9.6, dated 2026-09-16, and it requires .NET 8.0. The license allows personal and commercial use and redistribution of unmodified copies, but prohibits modification and reverse engineering.
For and against
For
- Free for personal and commercial use.
- Compares both files and folders.
- Highlights changed, removed, and added lines.
- Detects text encoding and warns about mismatches.
- Integrates with Windows Explorer.
Against
- Windows only; requires .NET 8.0.
- Compares two inputs at a time; no three-way merge.
- License prohibits modification and reverse engineering.
The verdict
Diffinity offers file and folder comparisons with several tools for reviewing and editing differences. Its two-input limit and Windows and .NET requirements are important to check first.
Who it suits
Diffinity suits Windows users who want to review text, source-code, or folder differences, including those configuring a diff tool for Git or Perforce Helix P4V.
Plans and prices
Diffinity
Free for personal and commercial use · Windows 7/8/10/11 · Requires .NET 8.0
Read 7 Oct 2026 · truehumandesign.se
On the record
- Command line
- Diffinity accepts file or folder paths and command-line options, including one to open the folder diff view.truehumandesign.se · read 7 Oct 2026
- Editing features
- The app supports syntax highlighting, customizable tabs, manual alignment markers, and inline diffs that update while typing.truehumandesign.se · read 7 Oct 2026
- Folder comparison
- Diffinity can compare folders as well as files.truehumandesign.se · read 7 Oct 2026
- Intended audience
- The maker describes True Human Design's programs as utilities made for functions the authors need, aiming to keep them powerful, simple, and small.truehumandesign.se · read 7 Oct 2026
- License
- The license permits free personal and commercial use and redistribution of unmodified copies, and prohibits modification and reverse engineering.truehumandesign.se · read 7 Oct 2026
- Purpose
- Diffinity compares and merges text files, showing differences line by line and highlighting differing characters or words.truehumandesign.se · read 7 Oct 2026
- Requirements and release
- The listed release is version 0.9.6, dated 2026-09-16, and requires .NET 8.0.truehumandesign.se · read 7 Oct 2026
- Review features
- It includes a thumbnail view of differences, distinguishes changed, removed, and added lines, and highlights instances of a selected or searched word.truehumandesign.se · read 7 Oct 2026
- Source code diffs
- The maker says Diffinity focuses on accurate, readable source code diffs and has improved diffing for C-style source code and XML.truehumandesign.se · read 7 Oct 2026
- Text encoding
- Diffinity supports Unicode, detects text encoding automatically, and warns when the compared files have an encoding mismatch.truehumandesign.se · read 7 Oct 2026
- Version control
- The documentation explains how to configure Diffinity with Git and Perforce Helix P4V as a diff tool.truehumandesign.se · read 7 Oct 2026
- Warranty
- The license provides the software as is and disclaims express and implied warranties.truehumandesign.se · read 7 Oct 2026
- Windows integration
- It integrates with Windows Explorer and can run directly from an external device.truehumandesign.se · read 7 Oct 2026
