WinMerge is an Open Source visual text file differencing and merging tool for Win32 platforms. It is highly useful for determing what has changed between project versions, and then merging changes between versions.


  • Visual differencing and merging of text files
  • Flexible editor with syntax highlighting, line numbers and word-wrap
  • Handles DOS, UNIX and MAC text file formats
  • Unicode support
  • Difference pane shows current difference in two vertical panes
  • Location pane shows map of files compared
  • Highlights differences inside lines in file compare
  • Regular Expression based file filters in directory compare allow excluding and including items
  • Moved lines detection in file compare
  • Creates patch files
  • Shell Integration (supports 64-bit Windows versions)
  • Rudimentary Visual SourceSafe and Rational ClearCase integration
  • Archive file support using 7-Zip
  • Plugin support
  • Localizable interface via resource DLL
  • Online manual and installed HTML Help manual

What's New


  • Allow renaming of untitled pages (#1395)

File compare

  • BugFix: "Replace All" doesn't work when Replace in "Selection" and the new string contains the old string. (#1376)
  • BugFix: "Match case" in Search always enabled (#1380)
  • BugFix: vertical editing for .h file is quite slow (#1386)
  • BugFix: replace text using regular expressions behaves incorrectly if multiple matches on the same line (#1387, PR #1388)
  • Optimize snake function (PR #1411)

Folder compare

  • BugFix: Fix an issue where paths with different case are not displayed correctly in the folder column of the folder compare window when comparing three directories. (PR #1372)
  • BugFix: Fix renaming process in folder compare window. (PR #1392)
  • BugFix: Elapsed time was no longer displayed in the status bar after folder comparison.
  • BugFix: Fix an issue where the folder column is not updated for child items after renaming a directory in the folder compare window. (PR #1408)


  • Modify textbox behavior (CompareMSExcelFiles options dialog) (PR #1374)
  • Make wsc files available as plug-in (PR #1390)

Archive support

  • Update 7-Zip to 22.00