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npm find-dupes — Identify duplicate dependencies in `node_modules`. More information: <https://docs.npmjs.com/cli/npm

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

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commandduplicatedependenciesnode_modulescliidentifymorenpm find-dupes

Problem

How to use the npm find-dupes command: Identify duplicate dependencies in node_modules. More information: <https://docs.npmjs.com/cli/npm-find-dupes/>.

Solution

npm find-dupes — Identify duplicate dependencies in node_modules. More information: <https://docs.npmjs.com/cli/npm-find-dupes/>.

List all duplicate packages within node_modules:

npm find-dupes

Include devDependencies in duplicate detection:

npm find-dupes --include dev

List all duplicate instances of a specific package in node_modules:

npm find-dupes {{package_name}}

Exclude optional dependencies from duplicate detection:

npm find-dupes --omit optional

Set the logging level for output:

npm find-dupes --loglevel {{silent|error|warn|info|verbose}}

Output duplicate information in JSON format:

npm find-dupes --json

Limit duplicate search to specific scopes:

npm find-dupes --scope {{@scope1,@scope2}}

Exclude specific scopes from duplicate detection:

npm find-dupes --omit-scope {{@scope1,@scope2}}

Code Snippets

List all duplicate packages within `node_modules`

npm find-dupes

Include `devDependencies` in duplicate detection

npm find-dupes --include dev

List all duplicate instances of a specific package in `node_modules`

npm find-dupes {{package_name}}

Exclude optional dependencies from duplicate detection

npm find-dupes --omit optional

Set the logging level for output

npm find-dupes --loglevel {{silent|error|warn|info|verbose}}

Context

tldr-pages: common/npm find-dupes

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