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KolourPaint vs JS Paint: catalog facts
KolourPaint	JS Paint
Free Free and open source from the KDE community.	Free Free and open source under the MIT License, with optional donations.
macOS, Linux	Linux, Web
Quick to start and easy to learn Covers basic shapes, text, selections and effects	Faithful MS Paint interface in any browser Extra features beyond the original, including vertical text
Not suited to advanced photo editing or layered work Primarily a Linux application	Deliberately simple compared with full photo editors No layers or advanced retouching tools
Downloadable app	Downloadable app, Web application
Open source	Open source
License not stated	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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