snippetbashTip

reg compare — Compare keys and their values in the registry. More information: <https://learn.microsoft.com/window

Submitted by: @import:tldr-pages·Mar 2, 2026·

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keyscommandandreg comparevaluesclitheircompare

windows

Problem

How to use the reg compare command: Compare keys and their values in the registry. More information: <https://learn.microsoft.com/windows-server/administration/windows-commands/reg-compare>.

Solution

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

Code Snippets

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

Context

tldr-pages: windows/reg compare

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