Summary: Here in this blog, we'll share a top list of five best online video aspect ratio converters for helping you change the aspect ratio online for free. Want to know what they are? Keep reading to find out.
Try to upload a fantastic video to YouTube or any other social media platforms to share it with others, but suddenly find that the aspect ratio can't fit the YouTube player exactly. Then how to change the video aspect ratio for sharing on YouTube, IGTV, or Twitter, making the dimension seamlessly match the player's window?
You just need a good video aspect ratio converter to help you fix this problem. Find out which ones below.
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Top 5 Online Video Aspect Ratio Converters
Below is our top list of the best online video aspect ratio converter. Check out and find your favorite one to change your video aspect ratio quickly and easily.
- FlexClip
- Clipchamp
- Online Converter
- Clideo
- Kapwing
Top Recommended: FlexClip
FlexClip is an excellent online video editor as well as video maker; it also can work as a video aspect ratio converter to help you change the aspect ratio to 16:9, 4:5, 1:1, 21:9, and 9:16 in a few clicks.

Image Board: Online Video Aspect Ratio Converter: FlexClip
FlexClip also allows you to zoom the video or drag the video to highlight the canter part and not miss the important information in your video after selecting the right aspect ratio. Besides, you have access to rich media resources, cool special effects, and all powerful editing tools for free to level up your video. Moreover, while exporting, no quality loss will occur.
Reasons for Recommendation:
√ Professional yet easy-to-operate. Besides changing the video aspect ratio, FlexClip is equipped with much more professional tools that enable you to make cool edits with great ease.
√ Free & Online. It is a web-based video editor, which means that you don’t need to download or install any software to your computer to change the aspect ratio and make more edits.
√ Watermark-free. The output contains no watermarks. Besides, you can add your own custom watermark at will.
√ Extremely fast. It will only take a few clicks to change the aspect ratio and download the video in minutes.
√ No quality loss. The editing process does not harm the video quality.
Top 2: ClipChamp
ClipChamp is another free web-based video editing tool that allows you to change the video aspect ratio and make edits to your video clips directly in-browser without inconvenient uploads. With its easy to use interface, you are sure to change the video aspect ratio and create a stunning video for YouTube, Instagram, Facebook, and other social media platforms easily and quickly.

Image Board: Online Video Aspect Ratio Changer: Clipchamp
Pros:
- Free and easy to use interface, friendly to beginner
- No watermark attached on your video when changing the video aspect ratio
- Allow uploading the video to social media directly
Cons:
- Registration needed to start editing your video
- Slow to load and export
Top 3: Online Converter
Online Converter also a great option for you to change the video aspect ratio. With this tool, you can change your video aspect ratio by specifying the width and height, or stretch in a specified ratio, or crop in a specified ratio.

Image Board: Online Video Aspect Ratio Converter: Online Converter
Pros:
- Completely free to use
- Various video formats support
Cons:
- The output video always be stretched or cropped
- Annoying ads on the website
Top 4: Clideo
Clideo offers an online video resizer as well as a video aspect ratio converter, which can help you make a video in any aspect ratio for posting on the video sharing sites, including Instagram, Facebook, YouTube, Snapchat, Twitter, Pinterest, and LinkedIn.

Image Board: Online Video Aspect Ratio Converter: Clideo
Pros:
- Free and easy to use
- Various video aspect ratios for different platforms supported
Cons:
- Always load your video in low speed
- Export your free video with a watermark
Top 5: Kapwing
Kapwing is an excellent online video editor, and it also helps you change the video aspect ratio in a few clicks. You can select the common aspect ratio that matches popular platforms like YouTube, Facebook, Instagram, Stories, etc.

Image Board: Online Video Aspect Ratio Converter: Kapwing
Pros:
- Free and easy to use
- Share videos to social media directly
Cons:
- Always leave the blank space on your output video
- Take several minutes to create your content
- Sign in needed to remove the watermark on your video
Final Words
Those are the top 5 best free online video aspect ratio converter. What's your favorite one? Which do you think is the best? Just try it out now! If you find this blog helpful, please share it with others.