---
sidebar_position: 5
sidebar_label: Installation
title: Extension Installation
summary: Instructions for installing external OHIF extensions using the OHIF CLI tool, which allows adding both local and published extensions from NPM to the viewer application.
---

# Extension: Installation

OHIF-v3 provides the ability to utilize external extensions.


You can use ohif `cli` tool to install both local and publicly published
extensions on NPM. You can read more [here](../../development/ohif-cli.md)