tldr/pages/windows/reg-compare.md

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# reg compare
> Compare keys and their values in the registry.
> More information: <https://learn.microsoft.com/windows-server/administration/windows-commands/reg-compare>.
- Compare all values under a specific key with another key:
`reg compare {{key_name1}} {{key_name2}}`
- Compare a specific [v]alue under two keys:
`reg compare {{key_name1}} {{key_name2}} /v {{value}}`
- Compare all [s]ubkeys and values for two keys:
`reg compare {{key_name1}} {{key_name2}} /s`
- Only [o]utput the matches ([s]ame) between the specified keys:
`reg compare {{key_name1}} {{key_name2}} /os`
- [o]utput the differences and matches ([a]ll) between the specified keys:
`reg compare {{key_name1}} {{key_name2}} /oa`
- Compare two keys, [o]utputting [n]othing:
`reg compare {{key_name1}} {{key_name2}} /on`