File converter / Video / Convert to MP4 / MKV converter / MP4 to MKV

Choose file to convert to .mkv

or drag and drop file

You can convert MP4 file to MKV as well as to variety of other formats with free online converter.

How to convert mkv to mp4?

Step 1

Upload mp4-file

Select mp4 file, which you want to convert, from your computer, Google Drive, Dropbox or drag and drop it on the page.

Step 2

Convert mp4 to mkv

Select mkv or any other format, which you want to convert.

Step 3

Download your mkv-file

Wait till your conversion process will be completed and click download converted mkv file.

Online and free mp4 to mkv converter

Fast and easy

Just drop your mp4 files on the page to convert mkv or 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 mp4 files instantly and converted mkv 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 mp4 to mkv conversions make in the cloud and don't use any resources of your computer.

MPEG-4 Video File

File extension	.mp4
File category	video
Description	The MP4 files (MPEG-4 part 14 files) are the multimedia files used with multiple stations and video players simultaneously. They can store digital audio streams and digital video, and other suitable amounts of data like subtitle tracks. MP4 video format is a widespread file format due to its very own container format. It is also used with multiple platforms such as iTunes, PlayStation, and portable PSP. It is also a popular file format for streaming over the Internet. For instance, YouTube videos have MP4 extension.
Technical details	The technical details of MP4 files differ in significant aspects and are unique as well, first released in 2001 under ISO/IEX 14496-1:2001 standards. It uses an AAC encoding to wear off unauthorized users from copying the data. The main purpose is streaming rather than sending video or audio information. MP4 files can be used to store audio streams and text information, subtitles, and still images. At the same time, MPEG format can’t do this. Anyhow the processing of data into MPEG-4 part 14 requires private streams such as the use of hint tracks to include the information.
Programs	Microsoft Windows Media Player VLC media player MPlayer Eltima Elmedia Player Winamp Apple QuickTime Player Apple iTunes
Developer	Moving Picture Experts Group
MIME type	audio/mp4 video/mp4

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 mp4 to mkv?

Firstly, select a mp4 file you want to convert or drag and drop it. Secondly, select mkv or any other 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 mp4 to mkv?

Video conversion usually takes a few seconds. You will convert mp4 to mkv very quickly.

🛡️ Is it secure to convert mp4 to 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 mp4 to mkv) is 100% safe.

📱 Can I convert mp4 to mkv without software installation?

Absolutely! OnlineConvertFree doesn’t require installation. You can convert any files (including mp4 to mkv) online on your computer or mobile.

mp4 converter

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Convert MP4 to MKV

How to convert mp4 to mkv?