iMovie is a popular video editing software that allows users to create and edit videos with ease. However, as you continue to use iMovie, your library can quickly become cluttered with large video files, which can take up a significant amount of storage space on your device. This can slow down your computer and make it difficult to find the videos you need. In this article, we will explore some tips and tricks on how to reduce your iMovie library size and keep your computer running smoothly.

What are some ways to decrease the size of an iMovie library?

1. Open iMovie on your Mac computer.
2. Click on the “File” menu in the top left corner of the screen.
3. Select “Delete Generated Files” from the drop-down menu.
4. A pop-up window will appear asking if you want to delete all optimized and proxy media files. Click “Delete” to confirm.
5. Next, click on the “File” menu again and select “Delete Project Files”.
6. Another pop-up window will appear asking if you want to delete all project files that are not used in any projects. Click “Delete” to confirm.
7. If you have any unused media files in your iMovie library, you can delete them by selecting them and pressing the “Delete” key on your keyboard.
8. Finally, you can also reduce the size of your iMovie library by exporting finished projects and deleting them from your library. To do this, select the project you want to export, click on the “Share” menu in the top right corner of the screen, and select “File”.
9. Choose the desired export settings and click “Next”.
10. Select a location to save the exported file and click “Save”.
11. Once the export is complete, you can delete the project from your iMovie library by selecting it and pressing the “Delete” key on your keyboard.


Reducing the size of your iMovie library is a great way to free up space on your device and ensure that your editing process runs smoothly. By removing unnecessary files, such as duplicates or unused footage, you can streamline your library and make it easier to find the clips you need. Additionally, optimizing your video settings and compressing your files can significantly reduce the amount of storage space your library takes up. With a little bit of effort and attention to detail, you can keep your iMovie library organized and efficient, allowing you to focus on creating amazing content.

Learn more with other iMovie Tutorials.

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