WebM is the type of media file known as royalty-free, high quality and open video compression. It was sponsored by Google aiming to improve users’ experience on online streams. WebM is also taken as HTML5 video because it uses HTML5 video tag. As a matter of fact, WebM is developed to replace the widespread use of flash video on the web. The rise of WebM files overwhelms flash files in a lot of aspects, like small file size, easy-to-spread via internet, etc. Though AVI files are the mainstream of web ads, video opening and ending, it has become outdated for the present. It is better to convert AVI to WebM format instead of flash format files if you’re wondering to public your video on the web. To know how to do this job, you may go to the followings.

Online solutions to convert AVI file to WebM video file


Apowersoft Free Online Video Converter

The most simple and convenient way is to do the format conversion online. Apowersoft Free Online Video Converter is a great online converting application. This tool is capable of recognizing most of media files and converting flawlessly to multiple formats. Beyond that, this application also comes with an editor which empowers users to customize their audio and video files based on their preferences, such as trimming, cropping, adding watermark and so on. Below are the exact steps on converting AVI to WebM with this online program.

  • Go to the page of Free Online Video Converter.
  • Click the button of “Select files to start” to browse local AVI video file.
  • Choose “WebM” as the output format in the menu of “Format”.
  • Activate editor to customize video clips by clicking the Pen icon. (Optional)
  • Return to main interface, then press “Convert” button to start converting.

convert avi to webm

Note that the online application will require you to download and install Launcher at the first time using. You can follow the hint pop-up on webpage.

Tips: Aside from converting functionality, this tool also allows you to customize resolution, bitrate and frame rate. Those options are available in the panel of “Settings”.

customize video



Another online converting program is Zamzar that is also popular in the field of online video converter. This application supports multiple types of media files including image, audio and video. With the help of this application, you can easily convert AVI to WebM file format. In the meanwhile, it can analyze video URL and help users convert the streams to desired video formats. You can check the guidance below to learn how to use this program.

  • Open the page of Zamzar.
  • Press “Choose Files” button to browse local AVI file.
  • Drop down the menu of “Step 2” and select “WebM”.
  • Fill in the blank of “Step 3” with your email address that you wish to receive the converted file.
  • Click “Convert” button to get start.


It might be time consuming for the converting process. And it only allows users to convert the media file for no more than 50MB, unless register its monthly paid account.

If you prefer more advanced functions, there’s a great desktop program available as well. Those tools enable you to convert media file offline and make conversion process more stable and faster.

Recommended AVI to WebM converter

Apowersoft Video Converter Studio

Apowersoft Video Converter Studio is a professional media file converting program that perfectly integrates the functions of video converting, editing, screen recording, online video downloading and MV creating. It offers various audio and video formats for converting, such as MP3, FLAC, WebM, WMV, etc. This program can convert media files in batch at same time. Also, its built-in editor allows you to trim, crop video clips, add effects, subtitle and watermark. You may do as follow to convert AVI to WebM.


  • Download and install the application on your PC.
  • Launch the program then add AVI video file.
  • Press “Profile” then choose “WebM” as the output format.
  • Click “Convert” button.

avi to webm converter

Tip: This application features a practical function that enables you to define file size for the output file. To do this job, you can click the button of “Size” then input desired number in the pop-up dialogue.

reduce file size


All those AVI to WebM converters are quite good to use. Viewing them generally, Apowersoft Free Online Video Converter is the best one. People can convert their media files without and costs or restrictions. Also, its additional functions are awesome and practical as well.

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