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

Convert MP4 to MKV

With our free online converter, you can convert mp4 files to mkv as well as a variety of other formats.

Converting your mp4 file to mkv is easy with these steps.

Converting your mkv file to mp4 is easy with these steps.

Icon of «Upload mp4-file»
Step 1

Upload mp4-file

You can select mp4 file you want to convert from your computer, Google Drive, Dropbox or simply drag and drop it onto the page.
Icon of «Select «to mkv»»
Step 2

Select «to mkv»

Choose mkv or any of the other 200+ supported formats you'd like to convert to.
Icon of «Download your mkv file»
Step 3

Download your mkv file

Please wait for the conversion to complete, then click on the download button to obtain your converted file in the mkv format.

Converting mp4 to mkv

Fast and easy
Simply drag and drop your mp4 files onto the webpage, and you'll be able to convert them to mkv or over 250 different file formats, all without having to register, provide an email address, or include a watermark.
You don't need to worry about security.
As soon as you upload your mp4 files, we instantly delete them. Converted files are then deleted after 24 hours. Furthermore, we ensure that all file transfers are secure through advanced SSL encryption.
Everything is stored in the cloud.
You don't have to go through the hassle of installing any software. We handle all mp4 to mkv conversions in the cloud, which means that none of your computer's resources will be used in the process.

MPEG-4 Video File

Extension.mp4
Category🔵 video
Programs
🔵 Microsoft Windows Media Player
🔵 VLC media player
🔵 MPlayer
🔵 Eltima Elmedia Player
🔵 Winamp
🔵 Apple QuickTime Player
🔵 Apple iTunes
Description🔵 .mp (MPEG- Part ) The .mp file format is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. MP is based on the Apple MOV format, but adds support for various other MPEG features. It's a universally accepted format with high compatibility across all platforms and devices, widely used for streaming over the internet, for storing digital video and audio streams, and for video playback on mobile devices.
Technical details🔵 The `.mp4` format, or MPEG-4 Part 14, is a versatile multimedia container with these features: - **Standardization**: Standardized by ISO/IEC as ISO/IEC 14496-14. - **Versatility**: Stores video (including 4K), audio, text (subtitles), and 3D graphics. - **Compression**: Uses MPEG-4 lossy compression, reducing file size with minimal quality loss. - **Video/Audio Codecs**: Commonly uses H.264 (MPEG-4 Part 10) for video and AAC for audio. - **Compatibility**: Widely supported by media players, editing tools, and devices. - **Streaming**: Suitable for internet streaming and progressive download. - **Metadata**: Supports metadata like titles, artist, GPS data, and scene descriptions. - **Chapter Support**: Enables easy navigation within videos. - **Subtitles/Closed Captions**: Includes subtitles/closed captions, embedded or as separate tracks. - **DRM Support**: Can be protected with DRM systems. - **File Size**: Varies based on quality, length, and codecs used. - **Interactivity**: Supports DVD-like menus and user navigation. `.mp4` is popular for its high-quality compression and broad compatibility, used widely in streaming, video editing, and various digital applications.
Developer🔵 Moving Picture Experts Group
MIME type
🔵 audio/mp4
🔵 video/mp4

Matroska Video File

Extension.mkv
Category🔵 video
Programs
🔵 VLC Media Player
Main program🔵 VLC Media Player
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.
Developer🔵 Steve Lhomme
MIME type
🔵 video/x-matroska

FAQ

❓ How do I change mp4 to mkv?
To get started, either pick a file you want to convert from mp4 and select it or drag and drop it into the conversion tool. Next, select the desired format that you wish to convert your file to. Once you have selected the format, click the "convert" button and wait for the tool to finish converting your file.
⏳ What is the estimated time it will take to convert mp4 to mkv?
Typically, image conversions only take a few seconds, so you can expect a speedy conversion when changing mp4 to mkv.
🛡️ Can I trust OnlineConvertFree to convert mp4 to mkv securely?
Absolutely! We take your security seriously, and guarantee the protection of your uploaded and converted files. No one will have access to your information since we delete all files once the conversion process is complete. You can trust that all types of conversions, including mp4 to mkv, are 100% safe on OnlineConvertFree.
📱 Is it possible to convert mp4 to mkv without having to install any software?
Yes, that's right! OnlineConvertFree doesn't require any installation, which means that you can convert any files, including mp4 to mkv, on your computer or mobile device, completely online.