How to Convert MKV to WebM Efficiently?

Author: Michelle
Publish date
Updated on May 22, 2024
MKV to WebM Converter
  • Download Download the Best MKV to WebM Converter and:
  • Step 1. Add MKV files.
  • Step 2. Select WebM as output format.
  • Step 3. Convert MKV to WebM at once.
Quick Navigation
1. Import Source Video
2. Pick Output Format
3. Start Process
MKV File to WebM Online?

When you try to stream MKV videos on your browser, you may experience some playback failures, such as no audio playing or no video at all. The main reason for this error is that the browser does not support MKV. In fact, MKV is not compatible with most browsers unless you pre-install a special plug-in on that browser. To fix this, you can also convert the MKV file to WebM, a standard video format natively supported by Chrome, Firefox, Opera, and many other browsers.

In the following, I will detail how to convert MKV to WebM. Read on if you’re interested.

How to Convert MKV to WebM Easy & Fast?

A good MKV to WebM converter is required to transcode MKV files to WebM quickly and smoothly. Here, I’d like to share a top-rated video converter WonderFox HD Video Converter Factory Pro. It is a professional video converter developed to handle various video and audio conversions. With support for all major video and audio formats, it can output MKV file to WebM effortlessly. Moreover, it features a batch conversion mode that can process multiple files at once.

Now, get the converter free download free download on your PC and follow the instructions below to convert your MKV videos to WebM:

Versatile Video Converter
Powerful Video Converter

WonderFox HD Video Converter Factory Pro can help you fast convert MKV to WebM in bulk. It can also convert between other popular formats, such as MP4, MOV, AVI, MP3, WAV, H264, H265, Xvid, etc. hassle-free. Get it now to convert between formats easily.

Free download Download for Free
Free download Download for Free

Step 1. Import MKV File(s)

Launch WonderFox HD Video Converter Factory Pro and open the Converter. Next, drag your MKV video(s) into the converter interface. Or you can use the + Add Files or the Add Video Folder button to load your MKV file(s).

Load File
Load File

Step 2. Choose Output Format

Click the right-side format image to unfold the output format list. Then go to the Web section and select WebM as the output format. You can freely choose other formats, such as MP4, if you have different ideas.

Tips: For advanced users who wish to change video bitrate or alter other parameters, they can open Parameter settings and do the configuration from there.

Choose Output Format
Choose Output Format

Step 3. Change .mkv to .webm

Click the ▼ button to specify an output path or leave it as default. When everything is ready, hit Run to start the process. If there are multiple files imported into the converter, the program will convert them simultaneously.

Start Conversion
Start Conversion
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HD Video Converter Factory Pro
More Than Just a Video Converter

HD Video Converter Factory Pro can better your digital life with more practical functions. See what it can benefit you exactly:

  • Convert any audio/video to be compatible with desired devices;
  • Save favorite movies and music from websites in high quality;
  • Downsize large files to half size while keeping the quality;
  • Capture screen meetings, gameplay, streaming video… with HD audio;
  • Personalize videos by cropping, clipping, merging, adding filter, etc.;
Free download Download for Free
Free download Download for Free

Can You Change MKV File to WebM Online?

Besides the method introduced above, you can also try online video converters. Simply upload, convert, download, and done. It’s very convenient and simple to use as long as you have strong internet. Yet, bear in mind that most converters online have size and length limits of the upload video and many do not support batch conversion as well. Hence, if you have large files or more than ten videos, you’d better stick to the desktop converter.


That’s all for how to convert MKV to WebM with the easiest solution. Hope you’ll find this article helpful. If you have any questions during the conversion process, you can feel free to contact me on Twitter. I’ll be glad to help. Thanks for reading.

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