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Wdiff vs Diffchecker: catalog facts
Wdiff	Diffchecker
Free Free software under the GPL-3.0-or-later license.	Freemium Basic online text comparison is free; some features have free trials and unlimited access…
Command line	Windows, macOS, Web
Shows changes at the word level Useful when paragraph reflow makes line-based differences hard to read	Compares text, files and code Offers a free side-by-side text comparison
Requires the `diff` program	Some comparison features are free to try and unlimited on Pro.
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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