Convert MKV to WEBM: Best Methods to Transform MKV Files

MKV file is an amazing container format that can store various videos, audio, subtitles, and more. It can even offer excellent quality, leading to a perfect viewing experience. However, if you want to engage yourself in the field of internet video streaming, this format might be unsuitable to use. One of the best file formats to consider for streaming videos is the WEBM format. It is the perfect format since it is designed to play various video files online. So, if you want a much better experience, the best solution is to convert your MKV file to WEBM format. You must check this blog post to find the best method to convert your video files. Thus, read this content and get a detailed method to convert MKV to WEBM.

Part 1. WEBM vs. MKV: Why Convert MKV to WEBM

What is MKV Format?

MKV, or Matroska Video, is a container format to mix and store various data, such as video, audio, caption sources, etc. It can even offer excellent video quality since it has a lossless compression algorithm. Aside from that, you can play this format for almost all media players, making it convenient for users. With that, if you want to enjoy watching your favorite content, MKV is among the best formats to access.

What is WEBM Format?

WEBM is a web-based media file. This file format was designed to play various files on the internet. It also comprises video streaming encoded through VP9 and VP8 video techniques. In addition to that, it allows you to enjoy your content since you can get an excellent quality during the video playback. With that, if you are a user who wants to stream videos, WEBM is the most suitable format you can use.

Why Convert MKV to WEBM?

There are various reasons why you need to convert MKV to WEBM. To get some of the important points, read all the information below.

• Modern web browsers widely support the WEBM format. It ensures that users can play videos smoothly on various devices and web platforms.

• The format contains a much smaller file size. With that, you can store more content on your device and can load the video faster on the net.

• The WEBM format is an open-source format. It makes it a cost-effective option for website owners and content creators.

• It can offer an excellent, high-quality video, leading to a satisfying watching experience.

Converting your MKV to WEBM is the right choice, especially when you want to stream videos. So, if you want to convert your files, you can get all the details you need by reading the following section of this content.

Part 2. Best Way to Convert MKV to WEBM

Converting MKV to WEBM might be challenging if you don't know what tool to use and how to start the procedure. If you are a beginner and prefer the easiest method to convert your MKV files, use AVAide Video Converter. This video-converting software can help you convert your files easily since it provides all the necessary functions. It can also offer a batch conversion procedure, which allows you to transform multiple MKV files in a single go. Moreover, you can rely on this software to save more time since the program can offer a conversion speed up to 30× faster than another converter. It can also support hundreds of video formats, such as MP4, FLV, WMV, VOB, MOV, and more. Lastly, one of this software's best capabilities is adjusting the video resolution, bitrate, sample rate, encoder, and other important parameters. So, if you want to convert your video files, follow the instructions below.

Step 1You can start the conversion process after you run AVAide Video Converter on your Windows or Mac computer.

Step 2After that, you can add the MKV file you want to convert by hitting the Converter > Add Files button.

Step 3From the Output Format option, select the WEBM file format. You can also pick the video quality you want for your video.

Step 4After selecting the WEBM and your preferred video quality, convert the file by ticking the Convert All button. Once done, you can already watch and use your converted video file.

Part 3. How to Use Ffmpeg to Convert MKV to WEBM

Another way to convert your MKV to WEBM is to use Ffmpeg. It is a command line tool that can help you transcode your files effectively. It can even help you get excellent video quality, making it more reliable and satisfying for users. What's more, you can even improve the quality of the audio of your video file. So, if you want great video and audio quality, you can use Ffmpeg to do the task.

Another good thing is that you can use FFmpeg to crop the video. With that, you can remove unwanted parts of your file. However, there are some drawbacks you must be aware of. Ffmpeg is hard to use since it requires enough knowledge to learn all the commands you need to get your desired output. Also, installing and setting up the tool on your computer takes a lot of time. But if you want to transform MKV to WEBM on Ffmpeg, see the steps below.

Step 1Download the Ffmpeg tool on your computer. Then, you can install and set up the tool to start the conversion process.

Step 2After that, go to CMD and start typing ffmpeg. Then, you can start inserting the command to convert the file. You can use the command below.

ffmpeg -i input.mkv -c:v libvpx-vp9 -b:v 2M -c:a libopus -b:a 128k output.webm

-i input.mkv - it is the file name of your MKV file.
-c:v libvpx-vp9 - this sets the video codec to VP9, leading to an excellent video quality.
-b:v 2M - this command sets the video's bitrate to 2Mbps.
-c:a libopus - it sets the codec of the audio to opus.
-b:a 128k - this command sets the audio bitrate to 128 Kbps.
output.webm - it identifies the file name using WEBM format.

Part 4. Convert MKV to WEBM Online using CloudConvert

If you prefer an online way to turn your MKV to WEBM format, you can use CloudConvert. This internet-based converter is a perfect tool to convert your files smoothly and easily. It can offer a simple procedure with a quick conversion process. Plus, unlike other online converters, this tool has no ads on the screen. With that, you can do the task without getting disturbed. Besides WEBM, you can also convert your MKV files to different formats. It includes MKV to FLV, MKV to MOV, MKV to WMV, and more. The only drawback is that you must have internet access to operate the program well.

Step 1Go to the CloudConvert website and click Select File to insert the MKV file you want to transcode.

Step 2Proceed to the Convert to option and click the WEBM format. After that, start transcoding your file by hitting the Convert button.

Step 3After the process, click Download to save your WEBM file on your device.

By Jane Pineda on May 12, 2025