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Winaero Tweaker vs Optimizer: catalog facts
Winaero Tweaker	Optimizer
Free Free to download and use.	Free Free and open source, no longer developed.
Windows	Windows
Hundreds of hidden Windows settings in one place Supports Windows 7 through Windows 11	Many privacy and performance tweaks in one portable program Available in 24 languages
Windows only Closed source	Deprecated and archived; the author points users to OptimizerNXT System tweaks such as stopping updates or disabling Defender can leave Windows less secure
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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 26, 2026

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