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File converter / Video / MKV

Online MKV converter

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Choose file to convert to .mkv
or drag and drop file

You can convert audio or video to MKV format with free online converter. If you want to convert several files at once you can upload files in the beginning or by clicking add more files button after the initial upload. No file size limit nor registration is required.

How to convert to mkv
Step 1

Upload file

Select file, which you want to convert from your computer, Google Drive, Dropbox or drag and drop it on the page
Step 2

Select «to mkv»

Select mkv or any other format, which you want to convert (more 200 supported formats)
Step 3

Download your mkv file

Wait till your file will be converted and click download mkv -file

Online and free mkv converter

Fast and easy
Just drop your mkv files on the page and you can convert it to more than 250 different file formats without registration, giving an email or watermark.
Don't worry about security.
We delete uploaded mkv files instantly and converted files after 24 hours. All files transfer with secured an advanced level of SSL encryption.
All in the cloud
You don't need to install any software. All mkv conversions make in the cloud and don't use any resources of your computer.
Matroska Video File
File extension .mkv
File category video
Description MKV Matroska is an open-source multimedia container format that supports more than one audio and subtitle tracks in the same file. It is the most convenient file type where you can add a large sum of data, such as videos, audios, texts, and various images. It is a RAW format which you can later flip and separate based on needed data tracks.
Technical details Whether it is video, audio, subtitle, or image, every file will be stored in a separate data line. It is a lot similar to the MP4 or AVI format, although when users are packaging an MKV file, they rarely bundle all the tracks within the file. Various media players don't even support the MKV video format; therefore, the users need to use specialized media players who can help the MKV format, such as VLC media player.
Programs
VLC Media Player
Main program VLC Media Player
Developer Steve Lhomme
MIME type
video/x-matroska

FAQ

❓ How can I convert mkv?
Firstly, select a mkv file you want to convert or drag and drop it. Secondly, select a format you want to convert your file to. Then click convert and wait until your file is converted
⏳ How long should I wait to convert mkv?
Video conversion usually takes a few seconds. You will convert mkv very quickly.
🛡️ Is it secure to convert mkv on OnlineConvertFree?
Sure! We delete your uploaded and converted files, so nobody has access to your information. All types of conversion on OnlineConvertFree (including mkv) is 100% safe.
📱 Can I convert mkv without software installation?
Absolutely! OnlineConvertFree doesn’t require installation. You can convert any files (including mkv) online on your computer or mobile.