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Seashore vs ItsPaint: catalog facts
Seashore	ItsPaint
Free Free and open source.	Free Free on the App Store and MIT licensed.
macOS	macOS
Native macOS interface Layers, brushes and effects for common editing tasks	Numbered step badges and pixelation for screenshot markup Creates blank canvases and edits existing images
macOS only Fewer features than professional image editors	Requires macOS 14 or later
Downloadable app	Downloadable app
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 October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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