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How To Clear Cache In NPM?

Tim Mouskhelichvili
Tim Mouskhelichvili
2 minutes to read

NPM (abbreviation for node package manager) is the most used package manager for JavaScript and Node.js projects. It helps developers manage external dependencies by providing simple-to-use commands. Sometimes, however, developers might encounter strange errors like: "Please run npm clear cache". Luckily, this error is easily fixable.

To clear the cache in npm, run this command:

bashnpm clear cache

In this article, I will explain different ways of clearing the cache in npm, why cache errors happen, how does the cache work, and many more.

Let's get to it 😎.

How To Clear Cache In NPM?

How does the npm cache work?

Installing a new npm dependency will automatically store a corresponding tar file inside the npm cache folder. If you install the same package again, this time, it won't be downloaded from the internet but taken from the npm cache.

The npm cache significantly reduces your downloads and optimizes the dependencies' installation time.

Note: Npm's cache verifies all the data's integrity on insertion and extraction.

Why clear your npm cache?

Since the fifth version of npm, clearing the cache is, in most cases, unnecessary since npm's cache is resistant to corruption and can self-heal. However, they are still some valid reasons to clear your cache.

Here are some of them:

  • To fix the "Please run npm cache clean" error.
  • To fix libraries that didn't download correctly.
  • If you desire to reinstall all the packages freshly.
  • To fix libraries that didn't save correctly.
  • If you wish to clear up disk space.

How to clear cache?

To clear cache in npm, type:

bashnpm clear cache

This command removes all the data inside the cache directory.

Sometimes, however, this command will not work, and you will need to use the force option:

bashnpm clear cache --force

If you want to verify that the command has successfully cleared the cache, use the npm cache verify command:

bashnpm cache verify

This command runs an offline verification of the cache's content.

Final thoughts

As you can see, clearing a cache in npm is super easy and can be done using one command. However, it should be unnecessary to clear the cache in most cases since the new npm version handles cache corruption very well.

npm clear cache

Here is another guide that I wrote (if you are interested in learning more about npm and other tools):

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