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KDiff3 vs Codiff: catalog facts
KDiff3	Codiff
Free Free and open source under the GPL v2 or later.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Windows
Compares and merges files and whole directories Three-way merge for resolving version control conflicts	Focused on quickly viewing local diffs Includes skill files for AI coding agents
Interface looks dated next to newer diff tools Focused on text; no rich comparison of binary formats	Young project with no published GitHub releases Documentation of features and platforms is limited
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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