How to Compress WebM Videos with Simple Clicks

When the video is large, you may find it's inconvenient to share it with others or upload it to platforms. That is why people need to compress video files to reduce their file size. Which is the best tool to reduce the file size of WebM videos? This post will give you some suggestions.

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Melissa Lee

Updated on Aug 22, 2023

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If a video is stored in different container formats, its file size varies accordingly. This fact causes a problem that sometimes you may get a video in a huge file size. As a result, you may fail to send the video to your friends because of the file size limitation of some instant communication software. The best solution is to compress the video and make it more convenient to transfer. But it's annoying that some video compressors don't support video formats that are not commonly used, such as WebM. The output videos of some online recording tools are usually contained in this format. 

This post aims at offering tutorials that can help you compress WebM videos with a few simple clicks. Both desktop software and online tools will be mentioned, and you can choose from them per your requirements. Now, let's dive into it.

1. How to Compress WebM Video on Windows

For Windows users who need to reduce the file size of WebM videos, EaseUS Video Converter is a go-to choice for many reasons. First of all, this software is allows you to adjust the settings freely so that you can choose a suitable resolution and quality for those WebM videos. And if you choose a lower resolution for your videos, their file size will be decreased. 

And this converter supports batch conversion, which means you can compress multiple videos at once. As it supports more than 500 video formats, you can also use EaseUS Video Converter to compress videos in other formats, including but not limited to MP4, MOV, AVI, FLV, etc. You don't even have to wait for a long time since this software works 30 times than other converters, attributed to the GPU acceleration technology.

Key Features:

  • Free video converters for Windows
  • Help you convert, compress, merge, and play video and audio files
  • Support extracting soundtrack from videos
  • The interface is user-friendly

If you need to conveniently compress WebM videos on Windows PC, click the button below to download it.

Method of Compressing WebM Video Using EaseUS Video Converter:

Step 1. Launch EaseUS Video Converter on your computer. Choose the "Video Converter" option and click the "Choose Files" button to import the WebM video you want to compress.

import video

Step 2. Then, hit the "Settings" icon to adjust the video parameters. You can choose to change the video format or still select WebM as the output video format. Then, choose a lower resolution to reduce the video file size. 

adjust webm settings

Step 3. After selecting the new video resolution, you can notice that the file size of your WebM video is decreased a lot. Finally, click the "Convert" button to start the compression, and you will find the compressed WebM video in the "Finished" tab. 

If you have a significant number of videos to compress, the "Convert All" button on the bottom of the user interface will help you process them in batches. 

compress webm video

2. How to Compress WebM Videos on Mac

If you are unsure which compressor is the best one for converting WebM videos on Mac, it's recommendable to use Movavi Video Converter. This video converter provides you with two modes to compress the WebM videos, the first one is degrading the video resolution, and the other is deciding a certain file size. 

In addition to video compression, this software also offers you some basic editing tools to trim or crop your videos. Movavi Video Converter also provides you with an AI quality upscaling tool, which you can use to restore the image quality of your WebM videos. You don't need to become a tech expert, and this software is easy to use for even beginners. 

movavi video converter

How to Reduce File Size of WebM Videos on Mac:

Step 1. Download Movavi Video Converter and install it on your Mac.

Step 2. Click on the "Add Media" > "Add Video" button and import the WebM videos you need to compress.

Step 3. Go to the "Video" tab and choose the output format. If you don't want to change the video format, select WebM as the output format, and then a list of options will appear. 

Step 4. Choose a suitable video resolution, such as 720P or 420P, to reduce the video size. Or you can set the desired file size manually, and you can find the button to do that under the output file name.

Step 5. Click the "Save to..." option and select a folder to save the compressed WebM video. Finally, hit the "Convert" button to start the video compression.

3. How to Use Online WebM Converters

Sometimes you perhaps store the WebM videos in the cloud storage, and it is time-consuming to download all those videos and compress them. Luckily, some online WebM compressing tools can help you do the compression directly online, and Clideo is one of the compressors worth trying.

You can access it by visiting its website. There is a "Choose file" button in the middle of its user interface, and you can click it to add the WebM video you need to compress. Clideo offers you different ways to choose the video, and it's possible to upload WebM videos from your PC, select the video from Google or Dropbox. Although this online WebM compressor is convenient to use, a disadvantage cannot be neglected: the format of the compressed video will be changed to MP4. 

compress webm online

Method of Compressing WebM Videos Online:

Step 1. Go to the website of the Clideo WebM compressor.

Step 2. Hit the "Choose file" button to upload the WebM video, or you can click the inverted triangle to choose the video from the cloud storage. 

Step 3. You will get some pay-for-use tools to edit your video, including merging, resizing, and adding subtitles. 

Step 4. Finally, hit the "Download" button to save the compressed video in MP4 format to your computer. It's also able to send the compressed video to cloud drive directly.


This post introduced some of the best WebM compressors on different platforms, including Windows, Mac, and online, as well as offered you detailed tutorials to guide you through using those compressors. If you are a Windows user, EaseUS Video Converter would be the best choice for you. It helps you customize the output video freely and gives you a comprehensive set of tools that is helpful in video compression. 

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