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How to Shrink Videos with iMovie: Tips to Reduce Size

Cynthia Jul 13, 2026

Are you working with large video files that demand excessive storage space? Or perhaps you need to upload videos to platforms with strict size limits? iMovie, Apple's user-friendly video editing software, offers several ways to reduce video size without significantly compromising quality. Let's explore the tools iMovie provides to help you minimize your video files.

the start menu for windows media player, which is highlighted in the window help section
the start menu for windows media player, which is highlighted in the window help section

Before we dive in, remember that reducing video size involves a compromise between file size and quality. Lossy compression formats like H.264 or HEVC (H.265) are used to shrink file sizes, but they remove some data from the original video, potentially affecting quality. It's essential to find the right balance for your needs.

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How to Stop iMovie From Cropping Video on iPhone

Compressing Video in iMovie

iMovie provides several ways to compress video. We'll discuss two key methods: frame rate reduction and output resolution adjustment.

split clips in imovie with click to play on the app for iphone or ipad
split clips in imovie with click to play on the app for iphone or ipad

Firstly, let's explore the iMovie interface and ensure you're in the correct workspace. Open your project and switch to the Project browser by clicking 'Filmstrip' in the toolbar. Here, you'll see all the clips in your movie, ready for adjustment.

Changing Frame Rate

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How to Change the Aspect Ratio in iMovie, Tailoring Your Video for Social Media

One way to reduce video size is to lower the frame rate. iMovie's default frame rate for HD videos is 30 frames per second (fps). Lowering this to 24fps can significantly reduce file size, with minimal impact on motion smoothness for most viewers.

To change the frame rate, select the clips you want to edit in the Project browser. Then, go to the 'Clip' tab in the toolbar above the viewer. Here, you'll see the frame rate option. Choose '్యం24' or another lower setting to decrease the file size. Once you've made your selection, iMovie will automatically compress the clips to the new frame rate.

Adjusting Output Resolution

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How to Compress iPhone Videos (5 Best Methods)

Another effective way to reduce video size is to adjust the output resolution. iMovie's default resolution for HD videos is 1080p (1920x1080 pixels). Lowering this to 720p (1280x720 pixels) or even 540p can significantly decrease file size without dramatic loss in quality, particularly on smaller screens.

To change the resolution, click on 'Share' in the toolbar, then 'Video'. Here, you'll see resolution options under 'Video Quality'. Choose a lower resolution like '480p HD' or '360p SD' to decrease the file size.

Other Ways to Reduce Video Size in iMovie

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Not Enough Disk Space for iMovie? Problems and Solutions

In addition to compression methods directly available in iMovie, there are several other ways to reduce video size before or after editing.

For instance, consider trimming your clips to remove any unwanted footage. This won't decrease the quality of the remaining content but will dramatically reduce the final file size. Simply select a clip, then use the 'Range Selection' tool in the viewer to trim the edges of your clip.

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an image of a screen with the text on it and a red arrow pointing up
an image of a screen with the text on it and a red arrow pointing up
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iMovie - How To Speed Up or Slow Down Video
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Am I dreaming? No! My life is a dream
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WHY 120fps IS OVERUSED. FRAME RATE GUIDE: 60/120/180fps
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Clone Effect 🧑🏻‍🤝‍🧑🏻

Removing Unused Clips

Another easy way to reduce the size of your iMovie project is to delete any unused clips. These clips are still stored in your project, taking up space, even though they're not included in your movie. To remove them, simply select unused clips in the Project browser and press the 'Delete' key.

Once you've finished editing and compressed your video, you can further reduce file size using third-party apps or services. Many offer more advanced compression tools and settings, giving you even greater control over your video's size and quality.

In conclusion, iMovie offers several tools to help you reduce video size, from changing frame rates and resolutions to trimming clips and removing unused footage. By mastering these techniques, you can create smaller, more manageable video files that don't sacrifice quality. So, start experimenting, find your balance, and let your creativity thrive!"