Free Online Video Aspect Ratio Converters: Change Ratios for YouTube, Instagram, TikTok

Try to upload a fantastic video to some social media platforms, but suddenly find that the aspect ratio can't fit the platform exactly. Then how to change the video aspect ratio for sharing on YouTube, IGTV, TikTok, or Twitter, making the dimension seamlessly match the player's window?

You just need a good video aspect ratio converter to help you change the video ratio and make it look amazing on any social media platform. Find out which ones below.

Can't Miss: How to Convert Portrait Video to Landscape>

Part 1 What Is the Best Aspect Ratio for Video?

Actually, there's no fixed answer if you're wondering about the best aspect ratio for a video. This mainly depends on the usage of your video. For example, if you're making a video for social media platforms, you should figure out the video aspect ratio standard of your target platform.

Different social media platforms have their preferred aspect ratios. Be sure to look up the recommended size and resolution of your platform before uploading your video. Here are some popular aspect ratios for various social media platforms:

Bonus: Free Editable Templates in Different Ratios for Your Video Inspiration

To help you make a video for your social channel easily, we'd like to share some professionally-designed video templates in different ratios for your inspiration. All of them are fully customizable!

Landscape Videos in 16:9 ratio for YouTube

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Brush Wedding Save The Date Collage Slideshow

Use This Template

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Dark Film Gold Particle Birthday Party Invitation

Use This Template

Vertical Videos in 9:16 ratio for Shorts, Reels, TikTok

Preview

Travel City Tourism Promo Climactic Trailer Slideshow

Use This Template

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Creative Fun Fashion Notes Tiktok Style Happy Birthday Wishes

Use This Template

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Dynamic Orange Film Grain Fitness Tips

Use This Template

Square Videos in 1:1 Ratio

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Minimal Leaves Warm Family Heart Collage Photo Memory Slideshow Post

Use This Template

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Clothing Sale Promo Instagram Post

Use This Template

Part 2 Best Video Aspect Ratio Converters for Any Social Platforms

Below is our top list of the best free online video aspect ratio converters you can try to change video aspect ratio for any social media platform. Check out and find your favorite one to change your video aspect ratio quickly and easily without downloading any software.

Free Online Video Aspect Ratio Converter - FlexClip

FlexClip is an excellent online video editor and a video maker; it can also 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 without downloading any software to your devices. Moreover, it's not just a video ratio converter – it also comes with additional powerful editing tools for more purposes, such as shorten a video, cut a video in the middle, put your videos side by side, and make more cool edits to make professional-looking videos for YouTube, TikTok, Instagram stories, or any social media platform..

Image Board: Online Video Aspect Ratio Converter: FlexClip

Reasons for Recommendation:

How to change the video aspect ratio for free with FlexClip?

Get Started Now View Templates

Step 1

Click the Get Started Now button below to access FlexClip video editor, and go to the Media section to upload your video and apply it to the Timeline. Here you can make any edit to trim, cut, and adjust your video footage, if needed.

Change Aspect Ratio with FlexClip Online Free - Upload

Step 2

Go to the ratio icon on the top left of the canvas, and choose the proper aspect ratio for your video - 9:16 for a TikTok or Reels video, 1:1 for a IGTV post, etc., select the one you need.

Change Aspect Ratio with FlexClip Online Free

Step 3

Preview the video, then download the video directly and seamlessly share it via a link, or post to social media and beyond. Or you can continue editing to level up your video, such as adding text, editing audio, adding overlay effects and stickers, etc.

Pro Tip: We highly recommend you give the AI tools a try to automate your video edits, generate video script with AI, easily turn your ideas into video in one click, and also effortlessly generate subtitles for your video with AI, and more, which will spark your creativity and help you create videos like never before.

Get Started Now View Templates

FlexClip AI Tools Walkthrough

Free Online Video Aspect Ratio Converter - Online Converter

Online Converter is also a great option for changing the video aspect ratio online without watermark for free. 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

How to change the video aspect ratio for free with Online Converter?

Free Online Video Aspect Ratio Converter - Free Convert

Free Convert is another free online video aspect ratio converter that allows you to change the video aspect ratio directly in-browser without downloading any software. It is actually a cloud-based converter that can convert various types of files. While converting the video file, it offers additional options, including aspect ratio, screen resolution, codec, and more.

Image Board: Online Video Aspect Ratio Converter: Free Convert

How to change the video aspect ratio for free with Free Convert?

Free Online Video Aspect Ratio Converter - File Converto

FileConverto is an online converter, which also offers a free “Change Video Aspect Ratio” tool that you can use to change your videos aspect ratio for free without a watermark. With this online tool, you can change the video aspect ratio to fit square, widescreen, or portrait frames. Simply select the video file, then select the new video aspect ratio you need.

Image Board: Online Video Aspect Ratio Converter: File Converto

How to change the video aspect ratio for free with File Converto?

Free Online Video Aspect Ratio Converter - 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. However, it only allows 720p export in the free plan, and you have to create an account to download your video without a watermark.

Image Board: Online Video Aspect Ratio Converter: Kapwing

How to change the video aspect ratio for free with Kapwing?

Sandy /

Has 4-year of professional photographing experience. Very much into recording every detail of life. She is passionate about all things related to video production, and loves to exploring tips and tricks about it.