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How to Quickly Change Video Aspect Ratio Online for Free

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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 a professional and easy-to-use online video maker, but it can also help you in changing video aspect ratio. Here are reasons why you should give FlexClip a try.

  • 1. In a few clicks, you can change the video aspect ratio successfully.
  • 2. FlexClip supports change video aspect ratio among 1:1, 16:9, 9:16, which basically meets all your needs.
  • 3. While exporting, no video quality loss will occur. You can export the video in the same resolution.
  • 4. FlexClip exports videos at a rather fast speed, saving you much time.
  • 5. It is completely free to use FlexClip.

Now, go to FlexClip main page https://www.flexclip.com with Chrome and sign up for free 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) > ratio. Choose 16:9,9:16 or 1:1.

Change Video Aspect Ratio with FlexClip - Step 2

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

Step 3. Click on Preview button on the top, if you are satisfied with the video, save it to your computer in 480p, 720p, or 1080p.

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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