HomeVideo ConverterMP4 ConverterConvert MP4 to MKV

Free Online MP4 to MKV Converter

Please note: Your MP4 file, once uploaded to our server will be deleted 1 hour after upload so please download your converted MP4 file before this time.

How to Convert your MP4 to MKV Online?

Here are 2 simple steps to convert your MP4 to MKV using our fast and free MP4 converter tool.

Upload your MP4 file

Click the "Upload a MP4 File" button, then select a MP4 to upload. The maximum file size is 1GB.

Download your MKV

Click the download link to receive your MKV file.

File format information for MP4 and MKV

Full NameMPEG-4
Mime Typevideo/mp4

The MP4 video format is a standard format for video encoding and storage. In order to minimize the file sizes the format employs a lossy compression method which reduces the amount of data to store the video content without any noticeable loss in quality.

Due to their small size and efficient compression methods the MP4 format is ideally suited to online video streaming. The MP4 format may use a variety of CODECs which are usually supported by most MP4 players with additional CODECs downloadable if needed.

Full NameMatroska Multimedia Container
Mime Typevideo/x-matroska

The MKV file format also known as the Matroska Multimedia Container is an open source container format similar to other video/audio container formats and can contain any number of multimedia/video/audio tracks within the MKV file. It was originally released in 2002.

Like other video file formats MKV files are binary and enjoy widespread support within video editing software. There is built-in support for playing MKV files within Windows 10 and 11. There are many open source Multiplexers and demultiplexers for converting between MKV and other multimedia formats.

Information for converting from MP4 to MKV

Our MP4 to MKV will attempt to convert these video format files with little or no loss in quality. You can upload video files upto 1GB in size, however with large MP4 files please allow time for converting to a MKV.

Frequently Asked Questions

How can I convert my MP4 file to MKV?

First click the "Upload..." button, select your MP4 file to upload. Your MP4 file will be uploaded to our servers. When the MP4 to MKV conversion has completed, you can download your MKV file straight away.

How long does it take to convert my MP4 to MKV?

We aim to process all MP4 to MKV conversions as quickly as possible, this usually takes around 5 seconds however this can be longer for certain files, so please be patient.

How accurate is the MP4 to MKV conversion?

We aim to provide the best conversion experience. Our tools are under constant review and development with new features being added every week.