Convert MP4 to MKV offline

Convert local MP4 files to MKV files offline by JavaScript in your web browser without any software downloads or file uploads!






OUTPUT FILES:
# File Name File Size Actions
How to convert MP4 to MKV offline

Choose local MP4 video files, choose "MKV" as target video format, then click the "CONVERT OFFLINE" button to start offline conversions in bulk. File size can be up to 2GB. Please note this offline audio converter only works in web browsers that support new technologies such as WebAssembly, Shared Array Buffer and Site Isolation. Use online converter instead if this offline converter doesn't work in your web browser.

 

Name MP4 MKV
Full name MPEG-4 Part 14 Matroska Video
File extension .mp4, .m4a, .m4p, .m4b, .m4r, .m4v .mkv, .mk3d, .mka, .mks
MIME video/mp4 video/x-matroska, audio/x-matroska
Developed by International Organization for Standardization www.matroska.org
Type of format Media container Container format
Introduction MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet.MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. The Matroska Multimedia Container is an open standard free container format, a file format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows.
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