Click Add Your Media and upload your MP4 file.
Make sure that the output format is set to WebM.
Click Convert.
Popular converters:
You can also convert your files with our powerful desktop app.
If you need to convert multiple files or your file is too large for the online converter, try the desktop alternative. The Movavi converter is a versatile audio, video, and image format changer. It deals with over 180 file formats, can convert files in bulk quickly, with high output quality and resolution. Its SuperSpeed mode gives you the fastest conversion speed and no quality loss. It has versions for both Windows PC and Mac and is really lightweight, allowing you to process photos, movies, and music files even on a weak computer.
How to convert MP4 to WebM fast and easy? Read the guide below to find out!
Step 1. Download and install the Movavi converter
How to use a file converter? First, download the version of the software for Microsoft Windows or Macintosh, launch it, and proceed following the on-screen instructions. When the app is installed to your computer, it will run automatically.
Locate the MP4 files you want to convert and drag-and-drop them into the program’s window. The application can convert big batches of files – there’s no limit to how many files you can transfer at once.
In the Formats menu, select the file type you want to turn your media into and choose the target format for the files. Also, you can change the conversion settings: choose a different bitrate, resolution (including HD, Ultra HD, and even 4K), codec, etc. Pay attention to the SuperSpeed label: it indicates that the conversion will be performed with a very high speed and without losing quality.
To specify the output folder, click the Save to button. Hit the Convert button to launch the process. When the converting is done, the new media files will be saved to the chosen folder.
Now you know how to change the file format using the Movavi converter. WIth this tool, you can also reduce the file size, cut out clips from videos, crop pictures, and create animations from your favorite movies. Get the free trial version and test it out!
Movavi Video Converter
8 best tools to convert MP4 to WebM for free
Do you wish to convert your videos into formats that can play on any device you want? You will need an online video converter. An online video converter does come in handy when converting MP4 to WebM. You can convert MP4 to WebM online using a number of software and converters. Using an online converter to convert MP4 to WebM is an easy and fast operation. However, given its disadvantages, such as Internet dependability, limited format support, limited file size upload, and lack of additional functionality, better alternatives to these free MP4-to-WebM converters are needed. As a result, there are desktop software MP4-to-WebM converters for download. They offer a wide range of features and functions and are an excellent alternative to online MP4-to-WebM converters. Below, you'll find reviews of some of the best programs with which you can convert for free.
1. Movavi Video Converter
Movavi Video Converter allows its users to easily switch between video, audio, and image formats in the blink of an eye. Among other useful features are video compression without loss of quality, built-in online search for subtitles, and AI upscaling.
Streamlined and simple interface makes it extremely easy to convert MP4 to WebM. Just add your files to the program, choose the desired format and start the conversion.
Pros:
Lightning fast conversion
No limit for batch conversions
Hardware acceleration support
Cons:
Restrictions of the trial version
2. CloudConvert
CloudConvert is a free MP4-to-WebM converter. It supports over 200 different file formats and integrates with Box, Dropbox, Google Drive, and OneDrive. The software is easy to use, has a straightforward interface, and does not require any installation.
The converter provides batch conversion and folder monitoring as well as a powerful API that allows us to use the service in our applications.
Transcode with CloudConvert by selecting your conversion settings in the top bar, in this case, .mp4 to .webm. Next, select the files you’d like to convert. At the bottom of your window, select where you want your converted files saved. Click Start Conversion.
Pros:
They support more than 200 audios, video, document, ebook, archive, image, spreadsheet, and presentation formats
There are no download or installation hassles
The interface is easy to use and understand
Most conversion types can be adjusted to your needs, such as setting the quality and many other options
Cons:
Dependent on whether or not an Internet connection is available
Additional features such as editing, downloading videos, and others are not supported
It only supports a limited size of files
3. Zamzar
Zamzar is a popular online converter that allows users to convert MP4 files to WebM format or WebM files to MP4 format. More than 1200 different conversions are supported by the software, including video, audio, eBooks, music, and many others.
The converter's interface is simple and straightforward, and it allows for easy conversion.
Simply upload the MP4 file, choose WebM as the output format, and type your email address into Zamzar. The website will send the link to download the converted file to the email address given.
Pros:
The quality of the file is not compromised while being converted
This tool allows you to choose a suitable file resolution before proceeding with the conversion
Supports numerous media formats
Comes with privacy and security features that safeguard user files
Cons:
Can only be used with a proper internet connection
The file size supported id limited
The supported media formats are fewer compared to desktop conversion software
This online converter is free to use and does not require any download or installation. It converts MP4 to WebM at a fast rate. You can either upload a video file or input the video link to convert it to WebM. Click Convert file to launch the VP8 converter.
Online-Convert supports importing files from Dropbox, Google Drive, and URLs in addition to local PC files. The converted files can be downloaded or saved directly to Google Drive or Dropbox using the website interface.
Pros:
The platform is free to use
The conversion process is relatively fast
There are no download or installation hassles
The interface is easy to use and understand
You can convert MP4 to WebM on a Mac or any non-typical OS
Cons:
Dependent on whether or not an Internet connection is available
Additional features such as editing, downloading videos, and others are not supported
It only supports a limited size of files
In comparison to professional software, the supported formats are minimal
With the online video converter, you can change your files’ video or audio format, not exceeding 100 MB, from MP4 to WebM free of charge. The tool is quite easily accessible through the website or via the google chrome extension.
To convert MP4 to WebM with the Online Video Converter, choose a media file for conversion from your computer or Dropbox. Select the desired format, which is WebM, from the list. You can use the enhanced settings feature to fix quality and more. Click the Convert button and download your WebM format file once the conversion is complete. The conversion is fast, and the file is encoded so that it can only be accessed by the uploader. It is then deleted from the server immediately after use.
Pros:
With Online Video Converter, you can convert MP4 to WebM for free
Can be easily accessed online through their website or browser extensions
Supports more than 40 media formats
Fast conversion rate
Cons:
Does not support batch conversions
Cannot be used offline
6. HandBrake
Converting MP4 to WebM with HandBrake is free for all Linux, Mac, and Windows users. Handbrake is mainly used as a tool for post-production editing.
The MP4 to WebM HandBrake conversion of videos is quite simplified. Moreover, Handbrake provides all the necessary features in a minimalistic tool that gives the user complete control over the outcome.
How to convert videos from MP4 to WebM using HandBrake
Below is a step by step process to convert MP4 to WebM on HandBrake:
After installing and running HandBrake, click Source and select Open a single video file.
Confirm that the format selected on HandBrake is WebM.
Select the folder to which you’d like to save the new video file.
Click Start Encode and wait for the conversion to be done.
You can also do the opposite: convert WebM to MP4 with HandBrake.
Pros:
Variety of built-in presents
A set of video filters
Completely free and without watermarks
Cons:
Users report occasional glitches
7. VLC
Using VLC to convert MP4 video to WebM is an excellent choice thanks to its compatibility with all existing audio and video formats, as well as its multi-platform features.
It is supported by Windows, Mac, Linux, Android, iOS, and other systems and transforms files, among other things, in addition to serving as a video player.
How to convert MP4 to WebM in VLC
Using VLC, convert to WebM by following these simple steps:
After opening VLC, click Media. Then, select Convert/Save.
In the window that opens, click Add to select the MP4 video file to convert.
After that, click Convert/Save. Select the Convert option.
In the next window, select the format you want to convert the video to and then, click Start.
Pros:
Can play any file format out there today
Allows you to customize your conversions
Users can use plugins to expand features
Cons:
Editing metadata in video files can be tricky if not experienced
8. FFmpeg
FFmpeg is an open-source command-line tool for easily modifying the format or quality of an AV file, extracting audio, making GIFs, and other tasks.
It's made up of several programs and libraries that deal with audio, video, and multimedia files and streams. It's also used behind the scenes in a variety of other media campaigns.
FFmpeg is primarily designed for Linux, but it is also compatible with Windows, Mac OS X, and other operating systems such as iOS, Android, MorphOS, and AmigaOS.
Transcoding MP4 to WebM with FFmpeg
When it comes to converting audio and video, the most common stumbling block is choosing the appropriate formats and containers. Fortunately, FFmpeg selects the proper codecs and containers without requiring any complicated configuration.
Let's assume you want to convert MP4 to WebM on FFmpeg:
ffmpeg -i input.mp4 output.webm
This command transforms an MP4 file called input.mp3 into a WebM file named output.webm. You don't have to define the type of stream or container because FFmpeg does it for you. Since WebM is a well-defined format, FFmpeg automatically recognizes what types of video and audio it can handle and converts the streams to a WebM file.
Pros:
Supports an incredibly wide range of video/audio codecs and formats
Offers granular control over codecs, bitrates, and resolutions for conversions
Automates tasks with scripting for batch conversions or workflows
Cons:
Command line requires knowledge for desired results (steep learning curve)
How to choose an MP4 to WebM converter
When it comes to video conversion, software video converters are a tried and true process. These apps have a lot of features and instructions that are easy to follow. It does not need you to be an expert to use. The rest is simple as long as you have it installed on your computer. Below are a few criteria of choosing a video converter.
Converting files from MP4 to WebM has become increasingly relevant in today's digital landscape, where different video formats serve various purposes. MP4, a digital multimedia container format, is widely used due to its compatibility with numerous devices and platforms. However, WebM, an open, royalty-free media file format, is gaining popularity, especially for use on the web, thanks to its high-quality video delivery and efficient compression.
For those seeking how to convert MP4 to WebM online, there are straightforward solutions available. One such option is using Online Video Converter. This tool provides a seamless way to convert MP4 to WebM online for free, without the hassle of software installation or unnecessary technical complexities. The appeal of such online converters lies in their accessibility and ease of use. They cater to users who need quick conversions without compromising on the quality of the output.
The process to convert MP4 to WebM for free using these online platforms is designed for user convenience. By simply uploading the MP4 file to the converter's website, selecting WebM as the target format, and initiating the conversion process, users can efficiently transform their files. This method not only saves time but also ensures that the original quality of the video is maintained, which is crucial for professionals and enthusiasts alike who value the integrity of their digital content.
Online Video Converter is not limited to just MP4 to WebM conversions. It supports a wide range of formats, catering to various conversion needs. Whether it's for professional use, such as preparing presentations or videos for web compatibility, or personal use, like sharing videos on social media platforms, this tool provides a reliable and straightforward solution.
What is MP4?
Full name
MPEG-4 Part 14
Format type
Video
Developed by
Moving Picture Experts Group
Description
MP4 is a format created in 2001 by an ISO/IEC working group. MP4 files are multimedia files used for storing video/audio and other content. Short for “MPEG-4 Part 14,” this file type is very common and recognized by most systems and devices. Check the list below if you’re not sure how to open MP4 files and which programs can play them.
File extension
.mp4
Technical details
MPEG-4 Part 14, also known as ISO/IEC 14496-14:2003, is one instance of a more general standard (ISO/IEC 14496-12:2004) with specifications based on Apple’s QuickTime File Format. The MPEG-4 container uses AAC for encoding audio as a means to restrict data copying via lossy compression and playback. Like its many counterparts, the container supports web streaming.
Associated programs
iTunes, QuickTime Player, Windows Media Player, VLC, RealPlayer, etc.
What is WebM?
Full name
Web Media File
Format type
Video
Developed by
On2, Xiph, and Matroska; now supported by Google
Description
WebM stands for Web Media File. It is an open, royalty-free, audiovisual file format created in 2010 specifically for the web. If you are not sure how to play a WebM file, you’ll find information about the WebM format specification and a list of programs that support playback of these files below.
File extension
.webm
Technical details
The WebM file type is used in HTML5 video and audio elements. It supports variable video frame rates and audio bitrates. In a WebM file, the video stream is compressed with VP8 or VP9 video codecs, and the audio stream with Vorbis or Opus audio codecs.
Associated programs
QuickTime Player, Google Chrome, Opera, Mozilla Firefox, YouTube, and Adobe Flash Player
Here’s what Movavi’s team does to provide you with verified information:
When selecting products to include in our reviews, we research both demand and popularity.
All the products covered in this article have been tested by our team.
When testing, we compare key characteristics, including supported input and output formats, quality loss when converting, and other significant features.
We study user reviews from popular review platforms and make use of this information when writing our product reviews.
We collect feedback from our users and analyze their opinions of Movavi software as well as products from other companies.
Movavi Video Converter
Frequently asked questions
A WebM file type consists of compressed video saved in the WebM format. It’s an open-source, royalty-free video standard developed by Google specifically for embedding videos into web pages; major web browsers such as Chrome, Mozilla, Opera, etc., support WebM. The WebM extension is a container format specially created for Internet streaming.
You can open a WEBM file with most modern web browsers, like Google Chrome, Opera, Firefox, and Edge. Additionally, there is software that functions as WebM players, such as Windows Media Player, VLC, and the Media Player Classic.
We recommend using Online Video Converter by Movavi. Simply follow the steps below:
If you need to turn your files from .mp4 to .webm, all you need is an appropriate piece of software – like Movavi Video Converter. This is the best MP4-to-WebM converter for Mac. Convert your files by following these simple steps:
Both video formats have their advantages. Your format of choice, whether WebM or MP4, is based on user preference and player compatibility. WebM is excellent for embedded videos, but only a few OSs and Android devices support it natively. MP4 is more widely supported, so you can easily use it with many video-editing programs and playback software. The degree of compression is almost identical for both formats.
WebM is a container format that stores compressed video and audio, so it’s a lossy format. Lossy compression reduces the quality of the video, as well as its size, but it does make WebM videos very suitable for embedding into web pages.
See other useful how-to guides
How to change M4A to MP3
How to convert AVI files to MPEG
How to convert a video to WMV
How to convert video files to QuickTime
How to convert WebM files to MP4
MP3 to AVI converter [online & free] – Movavi Video Converter
How to convert WebP to PNG – Movavi image converter
13 best YouTube to MP3 converters [2025]
MOV to GIF converter [online & free] – Movavi Video Converter
13 Best YouTube to MP3 Converters [2025] – Movavi
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