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Change Video Aspect Ratio to 16:9/4:5/1:1/21:9/9:16 Online for Free

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Last Updated: Sep. 07, 2020

Summary: This blog offers you a vivid explanation of what aspect ratio is and shows you detailed steps to change video aspect ratio. Follow us and you will find changing video aspect ratio can’t be easier.

What is aspect ratio?

The video aspect ratio describes the proportional relationship between the width and the height. Let’s say a video is 16 inches wide and 9 inches high, the video aspect ratio (the width to the height) is 16:9. A video which is 8 yards wide and 4.5 yards high, is also 16:9 in aspect ratio.

Different video aspect ratio fits different occasions and devices. 21:9 is often used in movies by filmmakers shooting on digital, 4:3, the “academy format”, is for movies made before the 1950s, and 16:9 videos are usually played on TVs and mobile devices.

Videos in a wrong aspect ratio may give audiences an overly stretched look. To fix problems led by wrong aspect ratio, do check this blog out. We will show you several easy ways to change video aspect ratio. Let’s get started.

Also Read: How to Add Music to Instagram Story >

Part 1. How to Use iMovie to Change Video Aspect Ratio

Note:Changing video aspect ratio can only be achieved with iMovie 10 or later, moreover, iMovie has other restrictions, like only videos with 480p, 540p, 720p, 1080p resolutions can be edited on iMovie. To skip all those restrictions, please refer to Part 2.

Step 1. Select a project in the Project Library or click to open one showing in the Project browser.

Change Video Apect Ratio on iMovie - Step 1

Image Board: Change Video Apect Ratio on iMovie - Step 1

Step 2. Go to File > Project Properties.

Step 3. Under the option of Aspect Ratio, you can set the export video aspect ratio to either 16:9, or 4:3.

Change Video Aspect Ratio on iMovie - Step 3

Image Board: Change Video Aspect Ratio on iMovie - Step 3

Tips:Even though iMovie is a default app on all Mac and iOS devices, it is impossible to change video aspect ratio with iMovie on iPhone, iPad.

Part 2. Change Video Aspect Ratio Online without Any Restrictions

Part 2 shows you the detailed steps on how to change video aspect ratio online with the help of FlexClip.

FlexClip is an iMovie-alike video editor with all powerful video editing features. It can easily help you change aspect ratio to 16:9, 4:5, 1:1, 21:9 and 9:16. After selecting the right aspect ratio, you can zoom the video or drag the video to make sure there won’t be any important information missing. Besides all that, you have access to rich media resources and all powerful editing tools for free. Do use them to level up your video. Moreover, while exporting, no quality loss will occur.

Now, go to FlexClip main page https://www.flexclip.com with Chrome to get started.

Step 1 Click on "+" button, go to Add Video > Browse My File to upload your video to the storyboard.

Change Video Aspect Ratio with FlexClip - Step 1

Image Board: Change Video Aspect Ratio with FlexClip - Step 1

Step 2 Go to Settings (the gear icon). Choose the right aspect ratio.

Change Video Aspect Ratio with FlexClip - Step 2

Image Board: Change Video Aspect Ratio with FlexClip - Step 2

Step 3 Fit the whole video by zooming or dragging.

Change Video Aspect Ratio with FlexClip - Step 3

Image Board: Change Video Aspect Ratio with FlexClip - Step 3

Step 4 Preview the video. Continue editing or export.

Advanced Tips to Use FlexClip:

1. You can edit the video with FlexClip’s cool features, like adding dynamic texts, making duets, splitting.

2. The export speed may vary. Please make sure you are connected to the stable Internet.

The Bottom Line

That’s all for two ways to change video aspect ratio. FlexClip, with its powerful feature, is surely a better tool to change video aspect ratio. By the way, FlexClip can also help you create many kinds of videos, like birthday video, slideshow. Explore more >

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