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Convert and compress videos/audios.

All-in-One Video Converter

Wondershare UniConverter

  • Convert MKV to WebM and other 1000+ video formats like MP4, WMV, AVI, etc.
  • Edit MKV and WebM files with trimming, cropping, rotating, adding watermarks, applying effects, etc.
  • Add and transfer MKV and WebM files from camcorder devices directly via a USB cable.
  • Versatile toolbox combines Screen Recorder, GIF maker, Media Metadata Editor, Video Compressor, etc.
WebM to MKV


1. Play MKV on Device+
  1. 1.1 Top MKV Player
  2. 1.2 Play MKV on Mac
  3. 1.3 Play MKV on Apple TV
  4. 1.4 Play MKV on Samsung TV
  5. 1.5 Play MKV on Sony TV
  6. 1.6 Play MKV on LG TV
  7. 1.7 Play MKV on PS3
  8. 1.8 Play MKV on Xbox One
  9. 1.9 Play MKV on Xbox360
  10. 1.10 Play MKV to iPhone
  11. 1.11 Play MKV to iPad
  12. 1.12 Play MKV on iPod
  13. 1.13 Play MKV on Android Phone
  14. 1.14 Play MKV in VLC
  15. 1.15 Play MKV in Windows Media Player
  16. 1.16 MKV Playback Issues in VLC
2. Convert MKV to Other Format+
  1. 2.1 Convert MKV to MP4
  2. 2.2 Convert MKV to MP4 on Mac
  3. 2.3 Convert MKV to MP4 Online
  4. 2.4 Convert MKV to MP3
  5. 2.5 Convert MKV to Audio
  6. 2.6 Convert MKV to WMV
  7. 2.7 Convert MKV to M4V
  8. 2.8 Convert MKV to AVI
  9. 2.9 Convert MKV to AVI Online
  10. 2.10 Convert MKV to FLV
  11. 2.11 Convert MKV to DVD
  12. 2.12 Convert MKV to MOV
  13. 2.13 Convert MKV to iTunes
  14. 2.14 MKV to MOV Converter Online
  15. 2.15 Convert MKV to VOB
  16. 2.16 Convert MKV to DivX
  17. 2.17 Convert MKV to MPEG
  18. 2.18 Convert MKV to MPEG2
  19. 2.19 Convert MKV to MPEG4
  20. 2.20 Convert MKV to XviD
  21. 2.21 Convert MKV to 3GP
  22. 2.22 Convert MKV to M2TS
  23. 2.24 Convert MKV to TS
  24. 2.25 Convert MKV to VCD
  25. 2.26 Convert MKV to AC3
  26. 2.27 Burn MKV to DVD
  27. 2.28 Burn MKV to Blu-ray
  28. 2.29 Convert MKV to SWF
  29. 2.30 Convert MKV to MP4 with Subtitle
  30. 2.31 Convert MKV to WAV
  31. 2.32 Convert MKV to MPG
  32. 2.33 Convert MKV to ISO
  33. 2.33 Convert MKV to WebM
3. Convert Other Format to MKV+
  1. 3.1 Convert MP4 to MKV
  2. 3.2 Convert MP4 to MKV on Mac
  3. 3.3 Convert MP4 to MKV Online
  4. 3.4 Convert M4V to MKV
  5. 3.5 Convert WMV to MKV
  6. 3.6 Convert MOV to MKV
  7. 3.7 Convert DVD to MKV
  8. 3.8 Convert M2TS to MKV
  9. 3.9 Convert AVI to MKV
  10. 3.10 Convert FLV to MKV
  11. 3.11 Convert AVCHD to MKV
  12. 3.12 Convert OGM to MKV
  13. 3.13 Convert MTS to MKV
  14. 3.14 Convert WTV to MKV
  15. 3.15 Convert VOB to MKV
  16. 3.16 Convert RMVB to MKV
  17. 3.18 Convert WebM to MKV
4. Edit MKV & Other Tips+
  1. 4.1 Extract Subtitles from MKV
  2. 4.2 Add Substitles to MKV
  3. 4.3 Add SRT to MKV
  4. 4.4 Compress MKV Video
  5. 4.5 Reduce MKV File Size
  6. 4.6 Cut MKV Files
  7. 4.7 Edit MKV Metadata
  8. 4.8 MKV No Sound
  9. 4.9 MKV Video Player for Android
  10. 4.10 MKV Converter for Mac
  11. 4.11 Free MKV Converter
  12. 4.12 MKV Player Mac
  13. 4.13 2D to 3D MKV Converter
  14. 4.14 Remux MKV
  15. 4.15 MKV Encoder
  16. 4.16 Convert MKV to FCP Mac
  17. 4.17 Stream MKV to TV with Chromecast
  18. 4.18 Import MKV to iMovie
  19. 4.19 Windows DVD Maker MKV
  20. 4.20 Convert MKV to MP4 with HandBrake Alternative
  21. 4.21 What is an MKV File

Top 5 Ways to Convert MKV to WebM Easily

by Christine Smith • 2024-01-11 10:27:37 • Proven solutions

MKV is a widely used multimedia container format, but several times, playing the file can cause issues when the codecs are not supported. So, if you want to upload your MKV files over the internet, it is recommended to convert it to WebM format as most web browsers, and streaming sites support it. Learn more about MKV to WebM conversion in the following parts of the topic.

Part 1. An all-in-one MKV to WebM Converter for Windows/Mac

The format conversion task can be done using a conversion tool, and one of the best in the category is Wondershare UniConverter. This professional software works as a complete video-toolbox that supports converting multimedia files in over 1000 formats, including MKV to WebM. For compatibility, device-specific conversions are also supported. The batch processing ensures that multiple files are converted at a time to save time and effort. Using Wondershare software, the files are converted without any quality loss, and additionally, editing features are also supported. 

video converter logo Wondershare UniConverter - MKV to WebM Converter for Windows/Mac

wondershare uniconverter
  • Convert MKV to WebM, MOV, FLV, AVI, WMV, and 1000+ formats with easy steps on Windows/Mac.
  • Burn and customize MKV and WebM files to DVD with free DVD menu templates.
  • Convert MKV to WebM files in batch with super fast speed and no quality loss.
  • Download or record videos from YouTube and other 10,000+ video sharing sites.
  • Edit WebM videos with trimming, cutting, cropping, adding subtitles, applying effects, etc.
  • Versatile toolbox combines video compression, DVD burning, file transfer, video recording, and more.
  • Supported OS: Windows 10/8/7/XP/Vista, macOS 11 Big Sur, 10.15 (Catalina), 10.14, 10.13, 10.12, 10.11, 10.10, 10.9, 10.8, 10.7, 10.6.
security download Security Verified, 5,481,347 people have downloaded it.

Here are steps to convert MKV to WebM using Wondershare UniConverter:

Step 1 Launch Wondershare UniConverter and load MKV files.

Open the installed software on your PC and the main interface, select the Video Converter tab from the left-side panel. Click on the add files icon at the top-left corner to browse and load the MKV files from your system. Alternatively, you can also click on the + sign at the center to add the files or drag and drop them to the interface.

mkv to webm

Step 2 Choose WebM as the target format.

The files added can be seen on the interface with a thumbnail image. Expand the drop-down menu at Output Format at the bottom left corner and choose WebM as the desired target format. Also, select the file resolution.

mkv to webm

Step 3 Convert MKV to WebM.

At the File Location tab on the bottom, select the system location to save the converted files. Finally, click on the Start All button to start with the conversion process. Upon completion, the converted files on the interface can be checked from the Finished tab.

mkv to webm

Part 3. A free MKV to Webm converter you can try

Online tools are internet-dependent and have limited formats and feature support. So, if you are looking for a decent desktop program free to use, Wondershare Free Video Converter is a good choice. Once installed on your system, the program works without any internet dependency and supports conversion in over 1000 formats and devices. The files are converted without any quality loss, and the converted files come with a watermark. Wondershare Free Video Converter has ads and is compatible with Windows and Mac. 

Steps to convert MKV to WebM using Wondershare Free Video Converter

Step 1: Download, install, and run the Wondershare Free Video Converter on your system. On the main interface, select the Convert tab and click on the +Add Files button to add the MKV files to be converted.

mkv to webm

Step 2: At the top-right corner, expand the drop-down list at Convert all files to tab and select WebM from the video list

mkv to webm

Step 3: At the Output tab, choose the desktop location to save the processed files. Click on the Convert All button to start processing. The converted files on the interface can be checked from the Converted tab. 

mkv to webm

Part 4. Other 2 ways to convert MKV to WebM Easily

Below listed are the other two popularly used online tools for converting your MKV files to WebM format.

  1. CloudConvert:

This is free to use online tool that works from the browser without any need for software installation. The conversion program supports all major video formats like MP4, MKV, WebM, MOV, etc. You can add local, online as well as videos from the cloud storage for the process. Converted files can be saved locally or to the cloud storage.

mkv to webm


  • Add files from the system, as URL, and from the cloud storage.
  • Option to edit file parameters like codec, bitrate, fps, width, height aspect ratio, and more.
  • Simple and user-friendly interface.


  • Internet-dependent.
  • Converted files have to be downloaded.
  1. Convertio:

Using this free browser-based program, MKV and other files to be converted can be added from the computer, URL, Google Drive, and Dropbox. At a time, multiple files up to 100MB can be added to the program for the process. You can save the processed to your computer or the cloud storage as needed.

mkv to webm


  • Add as well as save processed files from the computer and cloud storage.
  • Rotate, flip and change file parameters like frame rate, codec, and others
  • A free tool with a simple interface


  • The maximum supported file size is 100MB.
  • Dependency on the internet connection


The number of files to be converted and the additional features required will help you choose the apt MKV to WebM converter from the above-listed ones. For professional conversion in high quality and with added features, Wondershare UniConverter works as the best option. 

Christine Smith

Christine Smith

chief Editor

Resource > MKV Solutions > Top 5 Ways to Convert MKV to WebM Easily