WinMerge v2.16.55

v2.16.55Pre-releaseWindows

v2.16.55 (2026.04)

GitHub Releases (by Release)

WinMerge 2.16.55 Beta Release Notes

April 2026

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 production environments.

Please submit bug reports to our bug-tracker.

What Is New in 2.16.55 Beta
General

  • Fix incorrect GetAsyncKeyState usage for modifier key detection (PR #3257)

  • Update POCO C++ Libraries to 1.15.1 (PR #3292)

File compare

  • BugFix: Fix keyboard input issue after Alt+mouse operations (PR #3254)

  • BugFix: Register self-compare in MRU and refactor command line parameter buil… (PR #3266)

  • Refactor save confirmation logic using SaveClosingDlg::ShowAndSave (PR #3256)

  • Enable IME text reconversion in editor view (PR #3214)

Image compare

  • BugFix: Fix crash caused by OnClose being called twice in image compare window (PR #3255)

  • Speedup image comparision slider during WipeEffect (PR winimerge/#33)

Folder compare

  • BugFix: Fix an issue where skipped items were not properly filtered during folder/file comparison. (PR #3267)

  • BugFix: Fix potential hang in DiffWorker shutdown (PR #3300)

  • Extend “Merge renamed items” option to support moved items (PR #3181)

  • Refactor compare engines to use DiffContext (PR #3197)

  • Refactor compare engines to write results into DIFFITEM and add FullQuickCompare (PR #3201)

  • Add e:/e!: filter prefixes for files and directories (PR #3205)

  • Add replaceWithList and regexReplaceWithList filter functions (PR #3213)

  • Add Replace Lists menu for Rename/Move detection keys (PR #3215)

  • Make replace and replaceWithList case-insensitive (PR #3222)

  • Add directives (@cs, @ci, @name) to filter expressions (PR #3253)

  • Add "Filter by This Column" to folder view header context menu (PR #3268)

  • Add display filter attributes and UI for filtering by comparison results (PR #3284)

  • Add ability to hide empty folders in tree mode (PR #3293)

  • Add Unpacker and Prediffer fields to file filter expressions (PR #3295)

  • Enable dynamic increase/decrease of compare threads (PR #3304)

Plugins

  • Add PrettifyPO and ValidatePO plugins for .po/.pot files (PR #3190)

  • Feature request: In CompareMSExcelFiles do not append a sheet order number to individual tsv, txt or html files (#3212)

  • Add CFR Java decompiler plugin for .class file comparison (PR #3242,#3243)

Translations
  • Translation updates:
    • Brazilian (PR #3185,#3194,#3219,#3231,#3245,#3275,#3287,#3303)
    • Chinese Simplified (PR #3183,#3191,#3220,#3228,#3244)
    • Corsican (PR #3259,#3299)
    • French (PR #3239)
    • German (PR #3187,#3196,#3217,#3232,#3237,#3251,#3274,#3288,#3297)
    • Hungarian (PR #3186,#3238,#3252)
    • Italian (PR #3199,#3218,#3229,#3235,#3236,#3246,#3249,#3269,#3272,#3285,#3302)
    • Japanese (PR #3258)
    • Korean (PR #3247,#3279,#3301)
    • Lithuanian (PR #3184,#3192,#3230,#3276,#3290)
    • Polish (PR #3233,#3273)
    • Russian (PR #3226,#3281)
    • Turkish (PR #3204,#3221,#3227,#3250,#3271,#3286,#3298)
    • Ukrainian (PR #)
Documentation

  • Added: Community standard files (like issue templates, pr template). (PR #3225)

  • Add context IDs to PO files & strip comments for releases (PR #3296)

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)
What's Changed
New Contributors

Full Changelog: https://github.com/WinMerge/winmerge/compare/v2.16.54...v2.16.55

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