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KDiff3 vs Meld for macOS: catalog facts
KDiff3	Meld for macOS
Free Free and open source under the GPL v2 or later.	Free Free and open source under the GPL-2.0-or-later.
Windows, macOS, Linux	macOS
Compares and merges files and whole directories Three-way merge for resolving version control conflicts	Native macOS packaging of a familiar diff tool Side-by-side comparison and merging
Interface looks dated next to newer diff tools Focused on text; no rich comparison of binary formats	A community port maintained separately from Meld itself macOS only; other platforms use the main Meld builds
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.