Convert WEBM to MKV offline

Convert local WEBM 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 WEBM to MKV offline

Choose local WEBM 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.

 

Name WEBM MKV
Full name HTML5 Video Matroska Video
File extension .webm .mkv, .mk3d, .mka, .mks
MIME video/webm, audio/webm video/x-matroska, audio/x-matroska
Developed by Google www.matroska.org
Type of format Video file format Container format
Introduction WebM is a video file format. It is primarily intended to offer a royalty-free alternative to use in the HTML5 video tag. It has a sister project WebP for images. The development of the format is sponsored by Google, and the corresponding software is distributed under a BSD license. 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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