WinMerge 2.16.51 Beta Release Notes

• About This Release
• What Is New in 2.16.51 beta?
• Known issues

October 2025

About This Release

This is a WinMerge beta release which is meant for preview the current state of
WinMerge development. This release is not recommended for the production.

Please submit bug reports to our bug-tracker.

What Is New in 2.16.51 Beta

General

• BugFix: The document does not scroll with the mouse if the documents are identical.
  Or the text input cursor jumps to unequal lines. (#2939)

Appearance

• Initial dark mode support via darkmodelib (PR #2834,#2885)
• Improved header bar to reduce flicker

File compare

• Add option to ignore line breaks (treat as spaces) (refs #373) (PR #2945)

Folder compare

• Fixed an issue where adding exclusions via [Add Exclude File] ->
  [Editor Backup Files] incorrectly excluded most files.

Filters dialog

• Allow resizing of filters window using MFC Dynamic Layout (#509) (PR #2907)

Options dialog

• Allow saving modified colors as new scheme (#1180) (PR #2908)

Translations

• Translation updates:

  • Brazilian (#2886,#2910,#2951)
  • Chinese Simplified (PR #2889,#2916,#2952)
  • Corsican (PR #2915)
  • French (PR #2887,#2938,#2969)
  • Hungarian (PR #2909,#2948)
  • Italian (PR #2892,#2911,#2956)
  • Japanese
  • Korean (PR #2913,#2934,#2950)
  • Lithuanian (PR #2912,#2936,#2953)
  • Portuguese (PR #2928)
  • Polish (PR #2929,#2930,#2931)
  • Russian (PR #2890,#2919,#2920,#2933,#2944,#2949)
  • Spanish (PR #2961)
  • Swedish
  • Turkish (PR #2906,#2914,#2957)
  • Ukrainian (PR #2932,#2937,#2954)

Internals

• Refactor/use bindoption (PR #2955)

Known issues

• Pressing OK in the Options window while the INI file specified by /inifile is open for comparison in WinMerge may corrupt the file. (#2685)
• Suggestion to make the result of image comparison more reliable (#1391)
• Crashes when comparing large files (#325)
• Very slow to compare significantly different directories (#322)
• Vertical scrollbar breaks after pasting text (#296)