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GrafX2 vs Piskel: catalog facts
GrafX2	Piskel
Free Free and open source under the GPL-2.0 and CECILL-2.0 licences.	Free Free and open source, including the desktop versions.
Linux	Windows, macOS, Linux, Web
Built specifically for 256-color indexed images Suited to pixel art and palette-based drawing	Live animation preview with adjustable frame delay Exports animated GIFs and spritesheets
Not meant for full-color photo editing The official website offers very little information	Poorly suited to phones and portrait screens Focused on pixel art rather than general image editing
Downloadable app	Downloadable app, Web application
Open source	Open source
License: GPL-2.0	License not stated
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 September 24, 2026

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