Video to MKV Converter
Drop your video and download an MKV ready for Plex, VLC and Kodi.
How to convert video to MKV
- Add your video. Drag and drop an MP4, MOV, WebM, AVI, MKV or other video into the box above, or tap Choose video.
- Set the options. Adjust the resolution, quality and start and end trim. The defaults already work well for most MKV conversions.
- Convert and download. Press Convert to MKV, watch the progress bar, then download your video file. Click Convert another to do the next file.
What is MKV and why convert video to MKV?
MKV (Matroska) is a flexible open container loved by media servers like Plex, Jellyfin and Kodi.
With this free video to MKV converter you can:
- Add videos to a Plex or Jellyfin library
- Archive recordings in an open container
- Play files in VLC or Kodi
Pro tip: MKV is great for storage, but use MP4 when you need to upload to social sites.
Features of our MKV converter
100% private
The video to MKV conversion runs inside your browser with WebAssembly. Your file is never uploaded to a server.
No signup, no watermark
Use the MKV converter as often as you like. There is no account, no email and no logo stamped on your file.
Works on any device
Convert on Windows, Mac, Linux, Android, iPhone and iPad in Chrome, Edge, Firefox or Safari.
Fine control
Change the resolution, quality and start and end trim before converting.
All input formats
Open MP4, MOV, MKV, WebM, AVI, FLV, WMV, 3GP and most other video types.
Fast and free
No queue and no waiting for uploads, so short clips finish in seconds.
Why use our video to MKV tool?
Most online converters make you upload your video, wait in a queue and then download the result from their server. That wastes time and puts private footage on someone else’s computer. Our video to MKV converter does the work right in your browser, so it is faster for short clips and nothing is stored anywhere. When you close the tab, the file is gone.
Video to MKV FAQ
How do I convert a video to MKV?
Drop your video into the converter at the top of this page, adjust the resolution, quality and start and end trim, press Convert to MKV and download the result. It takes three steps and no account.
Is this video to MKV converter free?
Yes. The converter is completely free with no signup, no watermark and no daily limit.
Is it safe? Are my videos uploaded?
No upload happens. The conversion runs locally in your browser using ffmpeg compiled to WebAssembly, so your video never leaves your device.
What is MKV used for?
MKV (Matroska) is a flexible open container loved by media servers like Plex, Jellyfin and Kodi. People commonly use it to add videos to a Plex or Jellyfin library.
Which video formats can I convert to MKV?
You can convert MP4, MOV, MKV, WebM, AVI, FLV, WMV, 3GP and most other common video files to MKV.
Is there a file size limit?
Large files work, but because everything runs on your device, very big videos (over 500 MB) need more memory and time. Trim long videos first for the fastest result.
Can I convert video to MKV on iPhone or Android?
Yes. The tool works in mobile Safari and Chrome. On iPhone the download goes to the Files app; on Android it goes to your Downloads folder.
Any tips for the best MKV result?
MKV is great for storage, but use MP4 when you need to upload to social sites.