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uiGradients vs ColorZilla: catalog facts
uiGradients	ColorZilla
Free Free to browse and copy gradients.	Free Free browser extension.
Web	Browser extension
Ready-to-use CSS for every gradient Community-contributed collection to browse	Works directly in the browser without a separate app Gradient generator is a bonus beyond simple color picking
A gallery of fixed gradients rather than a gradient editor Little information on the site about how often new gradients are added	Limited to what's visible in the browser window No native desktop app outside the browser
Web application	Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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