Best 10 Ways to Convert AVI to WebM Online and Offline

This post will show 10 different online and offline ways to convert AVI to WebM easily. You can do this on Windows and Mac and any device using our methods! Keep reading and choose the best one for you.

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Jane Zhou

Updated on Nov 03, 2023

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AVI (Audio Video Interleave) is a file format developed and used by Windows to play high-quality videos. WebM format is 100% free and open-source coded, which is used with HTML for storing videos. Sometimes you may want to convert AVI to WebM for many reasons. For example, as WebM files can run very well on quite old PCs, you may want to convert videos to this format to make them perfectly fit for some old devices. 

This post will show you 10 ways to convert AVI to WebM effortlessly using offline and online tools for Windows and Mac. Let's get started!

Top 10 Best AVI to WebM Converter on Windows/Mac/Online:

How to Convert AVI to WebM on Windows - 3 Ways

First, this part will start with Windows. Here are the 3 converters and their detailed tutorials for converting AVI to WebM.

Tool 1. EaseUS Video Converetr 

When it comes to the most versatile converting software on Windows, EaseUS Video Converter is what you have to know. This software offers users a straightforward interface that can guide them to the tools they need so that even beginners can use it without any effort. If you want to work efficiently, this converter suits you best. 

Firstly, this converter is lightweight, so that it will not slow down the speed of the PC. Besides, this converter is equipped with the GPU acceleration function that can make this software work 30X faster than other converters. So that you don't have to wait a long time, even you have a lot of video and audio files that need to be converted.

Key Features:

  • One of the best free video converters
  • Support more than 1000 formats
  • Support batch conversion 
  • Support extracting audio from video

Don't miss this one if you are looking for a powerful converter to convert AVI videos to WebM format. Click the button and download it.

Steps to Convert AVI to WebM with EaseUS Video Converter:

Step 1. Download EaseUS Video Converter. Open it and select "Video Converter" from the three options. Then, hit "Choose Files". You can import the file from the computer. 

choose video converter

Step 2. When you see the listed video in this tool, hit "Settings" > "WEBM". At the same time, choose the desired Quality and Resolution. If you are going to apply more options, choose "Edit". 

To change the saving path, hit "Save to". Now, you can start your mission by clicking "Convert All".

video webm format

Step 3. After a while, you are supposed to find the converted file from "Finished". Meanwhile, to play, delete, and rename this file, you can right click it to choose the related function. 

output webm

Tool 2. Prism Video Converter 

Prism Video Converter is an easy-to-use software with great conversion features. It supports converting almost all major file formats, like AVI, WebM, MOV, MP4, etc.

As this AVI to WebM converter supports high-resolution conversion (4K), you are capable of processing videos of high quality and even videos on DVD with it. The conversion of videos happens very quickly, and there are pre-built special effects that can be added to the converted video. The tool can also perform batch conversion of hundreds of files at once. The most mentionable of this converter is its interface, which is relatively outdated but still usable.

prism avi to webm

Steps to Convert AVI to WebM on Windows:

Step 1. Download the software and launch it. Once the software is open, drag and drop your AVI files from File Explorers or click on the "Add Files" button. 

Step 2. From the "Output Format" dropdown, select "WebM" as the format. 

Step 3. Click on the "File Options" button to adjust any settings like the bitrate, file size, resizing, frame rate, etc. By clicking on the "Effects" button, you will be able to add Special Effects to your video.

Step 4. Once you are done with the settings, click on the "Convert" button. You can also preview what your converted file shall look like by clicking on the "Preview" button on the menu bar. 

Now your file shall be converted from AVI to WebM within a few seconds.

Tool 3. VLC Media Player 

VLC Media Player is one of the best free and open-source video and audio players, although not many people know that it can also edit and convert files. It supports the conversion of many formats, including MOV, MKV, AVI, WebM, MP4, etc. 

The conversion is swift, and the video quality of the source files can be perfectly preserved during the process. That is why you can convert high-resolution videos using this software. It is also integrated with some elementary and advanced video editing tools, and you can adjust the video properties in the conversion by customizing the size, bitrate, size, etc.

This open-source software is entirely free and compatible with nearly all OS, like Windows, Mac, Linux, Android, and iOS. Moreover, it is secure and has no ads. 

vlc avi to webm

Steps to Convert AVI Videos to WebM on Windows:

Step 1. Download and launch this software on your Windows PC.

Step 2. Open the app and go "Media > Convert" or click on "Ctrl + R" on your keyboard. Now a popup shall open. Click on the "Add" button and select the AVI file you want to convert on this popup. Then click on the "Convert/Save" button.

Step 3. Another popup shall now open. On this popup, click on the "Convert" checkbox, and you will see a profile dropdown. From that dropdown, select "VP80 + Vorbis (WebM)" for conversion to WebM format.  Then choose the location for the output file and set its name.

Step 4. Click on "Start" to start the conversion.

Now your file shall get converted into WebM format within several minutes.

Method of Converting AVI to WebM on Mac - 2 Ways

Here are two converters, HandBrake and Movavi Video Converter, and their tutorials for converting AVI to WebM on Mac.

Tool 1. HandBrake 

There are also open-source video and audio applications on Mac, such as HandBrake. Its excellent compatibility enables it to run smoothly on Mac, Windows, and even Linux, and this converter can process videos in many formats, like MP4, WebM, AVI, etc.

In addition to merely video conversion, this software also offers you many customization options for adjusting videos along with the converting process, such as changing the resolution, dimensions, and bitrate of the videos or applying special effects and filters to them. Its batch conversion feature helps you process hundreds of files at once, and it will take a shorter time than using other software as its conversion is swift and stable. 

handbrake avi to webm

Method of Converting AVI to WebM on Mac:

Step 1. Download the tool and then launch it.

Step 2. Open the app and click on the "Open Source" button and select the AVI file. Once the AVI video is in HandBrake, go to the "Summary" tab, and from the format, dropdown selects the "WebM" option. 

Step 3. You may customize the settings and click on the "Start" button at the top to start the conversion. 

Then, you only wait for a few seconds until the conversion is done and save the converted WebM file to your Mac.

Tool 2. Movavi Video Converter 

Movavi Video Converter is one of the most advanced video converters on Mac, and it's especially suitable for professional users. This converter supports more than 180 file formats ranging from MP4, AVI to VOB and MKV. It even helps you flexibly adjust the setting to make the output videos appropriate for some mobile devices, such as iPhone, iPad, etc.

The best part is that Movavi has no quality losses while converting even in processing 4k files. It uses hardware acceleration for fast conversion, which makes it convenient for batch conversion. Its built-in video editing tools enable you to trim, split your video clips, or add a watermark and subtitles to the videos. 

The interface is also very user-friendly, and it comes with support documentation and in-app guides to help new users.

movavi avi to webm

Method of Converting AVI to WebM on Mac:

Step 1. Download this app and then launch it on your Mac.

Step 2. Drag and drop files from Finder to the app or click on the "Browse" button to upload the AVI file.

Step 3. From the search bar, search for "WebM" and click on "Return." Now a list of formats shall come, and from that, select "WebM." 

Step 4. You can edit the properties by clicking on the "Gear" icon in the bottom left. Once you are done, click on the "Convert" button. Then, export the converted video to your Mac.

How to Use Online AVI to WebM Converter - 5 Ways

If offline tools are something that you do not like, then these online tools will help you! These run in your browser, require no additional downloads, and can run on every platform: Linux, Windows, Mac, iOS, ChromeOS, etc.

Tool 1. CloudConvert 

CloudConvert is one of the best free conversion services out there. It's 100% free, and you would only need an account to get started. As it supports various file formats, including audio, video, documents, image, archives, and even spreadsheets, you can rely on it whenever you require file conversion. 

Although many online tools only provide users with the most basic converting tools, this online AVI to WebM converter offers you options to adjust the video properties, such the bitrate, fps, quality, codec, etc. The conversion is swift and secure, and nobody can access your files illegally. 

cloudconvert uploading

Steps to Use Online AVI to WebM Converter:

Step 1. Open the page of this online tool using your Internet browser.

Step 2. Click on the "Select file" button to add a file from your computer. You can also add from cloud storage options or by URL. 

Step 3. From the options, you may edit various properties and even trim your video. Once you are done with that, click on the "Convert."

CloudConvert also supports batch conversion of hundreds of files at once so that you can convert a lot of video clips conveniently.

Tool 2. FreeConvert 

FreeConvert allows for the free online conversion of files up to 1 GB in size, and you can upload the AVI videos from many sources, such as your device, cloud, and URL. It supports lots of formats for videos, photos, documents, presentations, etc., and its polished and clean interface makes it easy for beginners. 

After uploading the source file to its server, there will be a gear icon beside the output format, and it allows you to customize the screen size, ratio aspect, and frame rate. You are also able to rotate or flip the output videos if it's necessary. When the conversion is done, there are options for saving the converted video to your device, while it's also optional to save the file in Google Drive and Dropbox.

avi to webm freeconvert

Steps to Use Online AVI to WebM Converter:

Step 1. Go to the page of the online converter. 

Step 2. Click on the "Choose Files" button to select the AVI file up to 1GB in size. Alternatively, the tool also supports URL and cloud storage options.

Step 3. The tool supports batch conversion of files. Once you have the AVI file added, either customize its setting by clicking on the gear icon or click on "Convert to WebM."

Step 4. After conversion, hit the "Download WEBM" button to save the converted video, or click the inverted triangle to save the WebM video in the cloud.

Tool 3. Zamzar 

Zamzar is an online conversion service that supports converting many other file formats apart from AVI, like MP4, DOC, PNG, etc. It supports over 1200 file formats.

This tool is straightforward to use with a modern interface, and it will guide you to do the conversion within three steps. Although this online tool works fast, it also gives an option for those who don't want to wait for the conversion to receive an email when the conversion is done.  

In addition, it offers you some introductions of the source format and the target format, which will be beneficial to users who want to differentiate those formats and select the best one from them.

zarzam avi to webm

Steps to Use AVI to WebM Converter Online:

Step 1. Visit the page of this converter via the Interner browser.

Step 2. Upload your AVI file by clicking on the "Add Files" button. The file size limit is only 50MB, though.

Step 3. Click on the "Convert" button to start the conversion. If you are away or if the conversion takes too long, then there is an option to email you the final transformation. 

Tool 4. Online Video Converter 

Online Video Converter allows you to convert your media effortlessly online without the need to install any additional software. It has fast and high-quality conversion with support for many formats. It also has quite a lot of settings for you to edit. 

The best part is that this tool also comes with a Chrome extension that can easily convert files while browsing the internet. It's a 100% free tool, so you won't have to pay to access extra features. The only con is that this website isn't very user-friendly and feels outdated.

online convert avi to webm

Steps to Use AVI to WebM Converter Online:

Step 1. Visit the page of this online converter.

Step 2. Upload your AVI file or add its URL. Now, adjust the settings which you want to customize.

Step 3. Click on the "Start conversion" button. A few seconds later, download the converted WebM video directly or download it as ZIP, or you can upload the output WebM video to the cloud.

Online convert also has some sample test files to test out the quality of the conversion before uploading your actual files.

Tool 5. 

 This online conversion tool has a beautifully designed website along with great conversion features. The encoding of files with this tool is high-speed and secure. 

All conversions take place on their powerful server, so your PC's resources won't be used, and it's beneficial for people using old devices. It has customization options for editing the output and a trimming tool to cut out parts of your video. This feature is beneficial in removing some necessary parts of your clips and making them tidier.

video converter avi to webm

How to Convert AVI to WebM Online:

Step 1. Go to the page of this online AVI to WebM converter.

Step 2. From the "Convert to" dropdown, choose the WebM format. And then, upload your AVI file by clicking on the "Add Media" button.

Step 3. Once your file is uploaded, you may click on the gear icon to adjust the settings or click on the "Convert" button to convert the file and download it. 


This post talked about the best 10 AVI to WebM converters you can use on Windows PC, Mac, or directly online. All of the tools mentioned have unique features, and they are suitable for different people.

For users who need some advanced functions, desktop applications are the best choices, and for users who want to save the storage space of their devices, online tools are most appropriate. EaseUS Video Converter is considered the best one for Windows users. It offers you file onverting tools and some related tools, like a file merger and a media player.

EaseUS VideoKit

All-in-one Video and Auido Tool

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