Click Add Your Media and upload your WebM file.
Make sure that the output format is set to MKV.
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 WebM to MKV 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 WebM 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!
Converting WebM to MKV online for free has become a breeze in today's digital age, thanks to the convenience offered by various online tools and platforms. One such option is Online Video Converter, which allows you to seamlessly transition your WebM files into the versatile MKV format without any cost or hassle.
WebM and MKV are two popular video file formats, each with its unique set of advantages. WebM is known for its efficient compression and playback support, making it a favorite for web-based content and streaming. On the other hand, MKV, short for Matroska Video, is renowned for its flexibility, capable of containing multiple video, audio, and subtitle tracks within a single file. It's often chosen for archiving and preserving high-quality videos.
To convert WebM to MKV online using Movavi's tool, you simply upload your WebM file to the platform. The converter then processes your video, preserving its original quality, and delivers a ready-to-download MKV file. This conversion process ensures that you can maintain the integrity of your content while benefiting from MKV's versatile features.
Whether you're wondering how to convert WebM to MKV online for better compatibility or archiving purposes, Online Video Converter is a user-friendly and cost-effective solution. It eliminates the need for complex software installations, providing you with a straightforward and accessible way to convert WebM to MKV for free, all within the convenience of your web browser.
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
What is MKV?
Full name
Matroska Multimedia Container
Format type
Video
Developed by
Lasse Kärkkäinen
Description
MKV (or Matroska Multimedia Container) is a free, open source video container format created in 2002. It’s officially called Matroska after the Russian matryoshka dolls because all the video, audio, and subtitle tracks are held within a single file. This format enables synchronous playback of audio and video tracks. Since MKV supports a large number of codecs and even uncompressed video, this format retains the original quality, allowing you to enjoy your videos in HD. Check this table if you want to know how to open MKV files and which programs can play them.
File extension
.mkv, .mk3d, .mka, .mks
Technical details
Videos with the MKV file type have a data channel for each type of track, making this format closer to other media containers such as AVI or MP4. A disadvantage of the MKV format is that very few modern programs can play files with these specifications correctly, so users have to install additional applications or codecs, for example, the VLC player or K-Lite Codec Pack.
Associated programs
VLC
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