[中文](https://pnpm.io/zh/) | [Español](https://pnpm.io/es/)
Fast, disk space efficient package manager:
* **Fast.** Up to 2x faster than the alternatives (see [benchmark](#benchmark)).
* **Efficient.** Files inside `node_modules` are linked from a single content-addressable storage.
* **[Great for monorepos](https://pnpm.io/workspaces).**
* **Strict.** A package can access only dependencies that are specified in its `package.json`.
* **Deterministic.** Has a lockfile called `pnpm-lock.yaml`.
* **Works everywhere.** Supports Windows, Linux, and macOS.
* **Battle-tested.** Used in production by teams of [all sizes](https://pnpm.io/users) since 2016.
To quote the [Rush](https://rushjs.io/) team:
> Microsoft uses pnpm in Rush repos with hundreds of projects and hundreds of PRs per day, and we’ve found it to be very fast and reliable.
[](https://www.npmjs.com/package/pnpm)
[](https://r.pnpm.io/chat)
[](#backers)
[](#sponsors)
[](https://twitter.com/pnpmjs)
## Background
pnpm uses a content-addressable filesystem to store all files from all module directories on a disk.
When using npm or Yarn, if you have 100 projects using lodash, you will have 100 copies of lodash on disk.
With pnpm, lodash will be stored in a content-addressable storage, so:
1. If you depend on different versions of lodash, only the files that differ are added to the store.
If lodash has 100 files, and a new version has a change only in one of those files,
`pnpm update` will only add 1 new file to the storage.
1. All the files are saved in a single place on the disk. When packages are installed, their files are linked
from that single place consuming no additional disk space. Linking is performed using either hard-links or reflinks (copy-on-write).
As a result, you save gigabytes of space on your disk and you have a lot faster installations!
If you'd like more details about the unique `node_modules` structure that pnpm creates and
why it works fine with the Node.js ecosystem, read this small article: [Flat node_modules is not the only way](https://pnpm.io/blog/2020/05/27/flat-node-modules-is-not-the-only-way).
## Installation
On macOS, Linux, or Windows Subsystem for Linux:
```
curl -f https://get.pnpm.io/v6.js | node - add --global pnpm
```
On Windows (using PowerShell):
```
(Invoke-WebRequest 'https://get.pnpm.io/v6.js' -UseBasicParsing).Content | node - add --global pnpm
```
Using npm:
```
npx pnpm add -g pnpm
```
For other installation options [visit our website](https://pnpm.io/installation).
We also ship an experimental new version of pnpm that may be used even with no Node.js installed on the system, see [@pnpm/beta](https://www.npmjs.com/package/@pnpm/beta).
## Usage
Just use pnpm in place of npm/Yarn. E.g., install dependencies via:
```
pnpm install
```
Also, pnpx instead of npx:
```
pnpx create-react-app my-cool-new-app
```
For more advanced usage, read [pnpm CLI](https://pnpm.io/pnpm-cli) on our website, or run `pnpm help`.
## Benchmark
pnpm is up to 2x faster than npm and Yarn classic. See all benchmarks [here](https://r.pnpm.io/benchmarks).
Benchmarks on an app with lots of dependencies:
## Support
- [Frequently Asked Questions](https://pnpm.io/faq)
- [Stack Overflow](https://stackoverflow.com/questions/tagged/pnpm)
- [Chat](https://r.pnpm.io/chat)
- [Twitter](https://twitter.com/pnpmjs)
- [Awesome list](https://github.com/pnpm/awesome-pnpm)
## Contributors
This project exists thanks to all the people who contribute. [[Contribute](../../blob/main/CONTRIBUTING.md)].
### Backers
Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/pnpm#backer)]
### Sponsors
Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/pnpm#sponsor)]
## License
[MIT](https://github.com/pnpm/pnpm/blob/main/LICENSE)
***
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