WebM, proposed by Google, is an open, free audiovisual media file format. Many people choose to convert YouTube to WebM for offline watching. This post lists 5 free YouTube to WebM converters, which include the best video converter – MiniTool Video Converter.

YouTube is a popular video-sharing website where you can upload, view, share videos, and subscribe to other users. YouTube covers a wide range of videos, TV shows, music videos, short films and documentaries, recordings, movie trailers, live streaming, and more.

You can download your favorite YouTube videos for viewing at any time. Besides, you are free to choose the output file formats when downloading YouTube videos, such as WebM, MP4, MOV, AVI, WMV, FLV, etc. The premise is you have a YouTube downloader or converter, that supports downloading and converting YouTube videos to your desired format.

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Part 1. YouTube to WebM

What Is WebM

WebM is a video file format developed by Google that can be offered free of charge and with open source. A WebM file extension is used for Matroska WebM video files. WebM file format is designed especially for the web based on standard HTML5. Video streaming is compressed by VP8/VP9 video codec and audio streaming is compressed by OGG Vorbis audio codec. WebM video streaming is supported by various web browsers such as Firefox, Opera, Chrome, etc. Besides, WebM video files are also supported by popular VLC Media Player, MPlayer, Winamp, etc. Google said WebM format is quite efficient and can be used in tablet, handheld devices, and other devices.


  • Free and open to everyone.
  • Simple container format.
  • Low computational footprint to enable playback on any devices, including low-power netbooks, handhelds, tablets, etc.
  • Highest quality real-time video delivery.
  • Play video with higher quality and better performance, even on old PCs.
  • Have implemented on more and more popular websites like YouTube, Wikimedia, 4chan, etc.

Con: Poor compatibility with mobile devices and players.

Why Convert YouTube to WebM

WebM format provides excellent quality for video files. In addition to that, the playback of this video format is effortless, so the videos in this format can be easily played even on machines with low technical characteristics. Meanwhile, WebM format is perfect for online streaming. Considering these factors, many people tend to convert YouTube to WebM for offline viewing.

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Part 2. Best Desktop YouTube to WebM Converter

As we all know, YouTube converters can be roughly divided into two types: desktop converters and online converters. However, the frustrating thing is that many professional YouTube converters don’t support converting YouTube to WebM, which makes it more difficult to convert YouTube to WebM with sound. Don’t worry. This article successfully found 5 of the best YouTube to WebM converters, including a desktop converter and 4 online converters. Let’s discuss the best desktop YouTube to WebM converter first.

#MiniTool Video Converter

MiniTool Video Converter is a free, simple, and no-ads desktop YouTube downloader. It doesn’t include any bundled software. This free YouTube video downloader offers a great choice of output formats – MP4, MP3, WAV, and WebM and different video resolutions. Besides, you can download multiple videos at once according to your needs. This free YouTube converter offers the fastest and easiest way to download and convert YouTube videos.

Also Read:Free Convert YouTube to MP4 without Losing Quality

Below are the detailed steps on how to convert YouTube to WebM with MiniTool Video Converter. It’s pretty easy to convert YouTube to WebM if you follow this guide.

Step 1. Download and install this free YouTube converter on your PC. Launch it and go to the Video Download tab to get its main interface.

MiniTool Video ConverterClick to Download100%Clean & Safe

Step 2. Enter the URL or the name of the YouTube video you would like to download and convert in the Search box and click the Download icon.

Alternatively, you can copy the URL of the YouTube video you want to convert, click the Paste URL icon next to the Download icon, paste the URL to the address bar on the left side of the Download button, and then click Download to start downloading.

Sep 3. Select webm(2160P/1440P/1080P/720P/480P/240P/144P) as the output format, and then click the DOWNLOAD button.

select WebM format and click DOWNLOAD
If you want to change the default downloader folder and the maximum number of concurrent downloads, click the hamburger button at the top-right side. Then you need to click the Settings button switch to the Download tab and click Browse to select another folder if you want. Then, you need to press OK to keep the change.

Then this free YouTube downloader begins to download and convert the YouTube video. After downloading, you can directly play the downloaded YouTube video or click the Navigate to file option to check the downloaded video and its subtitle file (.srt).

MiniTool Video Converter supports to download subtitles automatically. Please uncheck it if you don’t want subtitles.

MiniTool Video Converter can not only download YouTube videos but also download YouTube playlist and YouTube subtitles. Meanwhile, it supports converting YouTube to MP3, MP4 and WAV.

Key features

  • No limitation on download times and file size.
  • Simple and user-friendly interface.
  • High-speed conversion.
  • No registration.
  • 100% safe to download YouTube videos.
  • Absolutely free.
  • No ads inserting.
  • Download subtitles automatically.

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Part 3. Best Online YouTube to WebM Converters

Online YouTube converters can help you convert YouTube to many formats quickly. You don’t need to install any software or pay any money. The only thing you need to do is paste the URL of the YouTube video. Unfortunately, a lot of them are buggy and full of ads and malware. After testing and comparison, here list of the top 4 best online YouTube to WebM converters.


YouTube-WebM.com is a free online media conversion application, which allows you to record, convert and download nearly any audio or video to common formats. Currently, it supports YouTube (720p, 1080p, 4K), Facebook, Vimeo, YouKu, Yahoo 200+ Site, and many more. This free and fast converter allows you to watch your favorite YouTube videos offline on your PC, TV, or any other device.

the interface of YouTube-WebM.com

Key features

  • No need to register to use this YouTube to WebM
  • Converted WebM files from YouTube have no watermark.
  • Optional email notification once YouTube is converted to WebM.
  • Zip the WebM for easier download.


YouTubNow is a free online tool to download and convert YouTube videos. Users can search and download YouTube HD videos or soundtracks on YouTubNow freely without limitations. YouTubNow can satisfy all your needs, such as high quality, fluent download performance, and various output formats. With this excellent online YouTube downloader, just enter the URL or title of the YouTube video, and you can get a YouTube download online even without opening the YouTube platform in one shot.

the interface of YouTubNow

Key features

  • No registration required.
  • High compatibility.
  • Various output selections.
  • Powerful built-in search engine.
  • Free and unlimited download chances.


YTOffline is a powerful online YouTube video downloader and converter. It is one of the best and easiest online tools allowing you to save YouTube videos in high-quality MP4, WebM, 3GP, and M4A formats. YTOffline video downloader supports the download of HD video in 1080 and 720p qualities. Since this website works in the browser there’s no software download or installation necessary to make it work.

the interface of YTOffline

Key features

  • Download your favorite YouTube videos and save them for offline use.
  • Everything is online and no additional software or apps are required.
  • Save unlimited YouTube clips.
  • Download YouTube videos in MP4, WebM, 3GP, FLV, M4A formats.
  • 100% safe website using SSL encryption and free of any malware.
  • User-friendly interface and free to use.


Y2mate allows you to convert and download videos from YouTube, Facebook, Video, Dailymotion, Youku, etc. to MP3, and MP4 in HD quality. Y2mate supports downloading all video formats such as MP4, M4V, 3GP, WMV, FLV, MO, MP3, WebM, etc. You can easily download for free thousands of videos from YouTube and other websites.

the interface of Y2mate.com

Key features

  • Compatible with all browsers.
  • High-speed video converter.
  • No registration required.
  • Supports YouTube, DailyMotion, Facebook, and other sites.
  • Supported output formats include MP4, WMV, FLV, MOV, MP3, WebM, and others.
  • No restriction on the number of downloads or conversions that can be done.

Part 4. Comparison Between Desktop and Online YouTube Converter

Desktop YouTube ConverterOnline YouTube Converter
ProsThere is no need for registration.
It’s absolutely free.
There are no ads.
It’s 100% safe to download videos without viruses.
There is no limitation on conversion times and file size.
It allows converting YouTube videos to many formats.
It can download YouTube videos, YouTube playlists and subtitles for free.
It’s much easier than desktop converter.
It has a super-fast converting speed.
It supports to convert videos on other popular websites.
It can also convert documents and e-books.
ConsIt’s mandatory to download the software.It’s mandatory to connect the internet.
It has limitation on conversion times and converted file size.
There might be lots of ads when converting.
It could bring viruses to computers.

To sum up, the desktop converter is much better than the online converter. Its most prominent advantage is there is no virus intrusion and no ad insertion. If you still don’t know which one to choose, then I suggest you try them yourself and compare them. After all, all of the above YouTube converters are free to use.

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Part 5. Bonus Tip – Best WebM Player

After you successfully converted YouTube to WebM, it’s time to watch the video. How to play WebM files? The following is the best WebM player – VLC Media Player.

VLC Media Player, commonly known as VLC, is a free and open-source software, a portable and cross-platform media player and streaming media server written by the VideoLAN project. VLC is available for desktop operating systems and mobile platforms. Besides, the VLC media player supports many audio and video compression methods and file formats, including DVD-Video, video CD, and streaming protocols. It can stream media over computer networks and transcode multimedia files. Therefore, it’s the best choice to play WebM files.

Also Read:6 Best Video Players in 2019 (Windows & Mac)

Key features:

  • Convert audio or video files to any format.
  • Stream or download YouTube videos.
  • Record an audio or video.
  • Record your desktop and webcam.
  • Create bookmarks.
  • Set video as a wallpaper.
  • Add watermarks on videos.

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Bottom Line

Now, it’s your turn to begin your YouTube to WebM conversion. Which converter will you choose? If you have any questions or suggestions about it, please let us know via [email protected] or share them in the comments section below.

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