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Just Color Picker vs ColorZilla: catalog facts
Just Color Picker	ColorZilla
Free Free to download and use.	Free Free browser extension.
Windows, macOS	Browser extension
Portable and works offline Screen freeze and point lock for precise picking	Works directly in the browser without a separate app Gradient generator is a bonus beyond simple color picking
Not open source No Linux version	Limited to what's visible in the browser window No native desktop app outside the browser
Downloadable app	Browser extension
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
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.