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KDiff3DiffMerge
Free

Free and open source under the GPL v2 or later.

 Free

Free to use under SourceGear's freeware license.

Windows, macOS, Linux Windows, macOS, Linux
  • Compares and merges files and whole directories
  • Three-way merge for resolving version control conflicts
  • Two-way diff and three-way merge with editable panes
  • Side-by-side folder comparison
  • Interface looks dated next to newer diff tools
  • Focused on text; no rich comparison of binary formats
  • Closed source freeware
  • Infrequent updates
Downloadable app Downloadable app
Open source Closed source
License: GPL-2.0-or-later License: Freeware
No account needed No account needed
Works offline Works offline

Checked October 1, 2026

Checked October 2, 2026

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