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    0.2.1 • Public • Published

    NPM License Crawler

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    NPM License Crawler is a wrapper around license-checker to analyze several node packages (package.json files) as part of your software project. This way, it is possible to create a list of third party licenses for your software project in one go. File paths containing ".git" or "node_modules" are ignored at the stage where 'package.json' files are matched to provide the entry points to calling license-checker.


    If you like npm-license-crawler, please consider ★ starring the project on github. Contributions to the project are welcome. You can simply fork the project and create a pull request with your contribution to start with.


    Use global installation to be able to run npm-license-crawler from the command line.

    npm i npm-license-crawler -g


    • --start directory-path: path to the directory the license search should start from. If omitted the current working directory is assumed.

    • --exclude directory-path: path to a directory to be excluded (and its subdirectories) from the search.

    • --unknown: show only licenses that can't be determined or have been guessed.

    • --dependencies: show only third-party licenses, i.e., only list the dependencies defined in package.json.

    • --production: show only production dependencies

    • --development: show only development dependencies

    • --onlyDirectDependencies: show only direct dependencies licenses, i.e., don't list dependencies of dependencies.

    • --omitVersion: omit version numbers in result (e.g. "npm-license-crawler@0.1.5" becomes "npm-license-crawler")

    • --no-color: (or --no-color) don't show colors in the console output

    • --relativeLicensePath: output the relative file path for license files.

    • --json /path/to/save.json: export data as JSON to the given file. The path will be created if it does not exist.

    • --csv /path/to/save.csv: export the data as comma-separated values to the given file. The path will be created if it does not exist.


    Called from the npm-license-crawler installation directory. If called in another directory make sure the given exclude path exists (or omit the --exclude option and argument).

    npm-license-crawler  --exclude ./lib --dependencies --csv licenses.csv

    Using npm-license-crawler API

    See the following example.

    var crawler = require('npm-license-crawler'),
        options = {
            start: ['../..'],
            exclude: ['.'],
            json: 'licenses.json',
            unknown: true
        function(error, res){
            if (error) {
                console.error("Error:", error);
            else {


    See Release History.

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    • mwittig