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LibreMerge

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Free, open-source diff and merge tool for macOS and Linux — WinMerge's battle-tested engine with a native Qt 6 interface.

Side-by-side file comparison on macOS: gold difference blocks, word-level highlights inside each line, ghost-line alignment and the Diff Pane showing the current difference.

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  • Mac
  • Linux
Dark theme with syntax highlighting: comparing C++ source files with WinMerge's classic navigation — differences are edited and merged in place.
LibreMerge running natively on Linux (Debian GNOME), the same engine and interface on every platform.
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Folder comparison with expandable tree, per-side sizes and dates, filters, and copy/delete operations between sides.
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Development, File Management, OS & Utilities

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  •  20 Stars
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  •  3 Open Issues
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LibreMerge was added to AlternativeTo by Iago Passos on and this page was last updated .

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What is LibreMerge?

LibreMerge brings the WinMerge experience beyond Windows. It reuses WinMerge's battle-tested comparison engine (GNU diffutils + git xdiff, folder scanning, moved-block detection, Unicode handling) and rebuilds the interface natively with Qt 6. If you know WinMerge, you already know LibreMerge: the layout, colors and workflow are intentionally the same.

Features: side-by-side file comparison and merging (2-way and 3-way) with word-level highlights and ghost-line alignment; free editing with live recompare; folder comparison with tree view, filters and copy/delete operations; CSV/TSV table comparison with cell-level diff highlighting; syntax highlighting for 47 languages; line filters (regex) and moved-block detection; find & replace; light and dark themes; English and Brazilian Portuguese interface.

Available as a universal macOS app (Intel + Apple Silicon, macOS 12+, also via Homebrew), Linux AppImage (x86_64 and arm64) and Debian package. Licensed GPL-3.0 — free forever, no accounts, no telemetry.