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O&O RegEditor vs RegScanner: catalog facts
O&O RegEditor	RegScanner
Free Freeware under the O&O end-user licence.	Free Freeware from NirSoft with no paid tier.
Windows	Windows
Fast search across the registry Backup functions before making changes	Shows all search results at once instead of pressing F3 Filters by type, data length, modified date and owner
Windows only Closed source freeware	Remote Registry scanning can be slow Deleting keys is risky even with the automatic backup
Downloadable app	Downloadable app
Closed source	Closed source
License: Freeware	License: Freeware
Not stated if an account is 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.