WEBM to MKV Converter

Select files for conversion or just drag and drop them to the upload area

How to convert WEBM files to MKV online?

Step 1.

Upload WEBM-file

Click "Choose File" button to select a webm file on your computer. WEBM file size can be up to 50 Mb.
Step 2.

Convert WEBM to MKV

Click "Convert" button to start conversion.
Step 3.

Download your MKV

Let the file convert and you can download your MKV file right afterwards.

Information about WEBM and MKV file formats

Name WEBM MKV
Full name WEBM - HTML5 video MKV - Matroska
File extension .webm .mkv, .mk3d, .mka, .mks
MIME type video/webm, audio/webm video/x-matroska, audio/x-matroska
Developed by Google www.matroska.org
Type of format video file format Container format
Description 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.
Technical details The WebM container is based on a profile of Matroska. WebM initially supported VP8 video and Vorbis audio streams. In 2013 it was updated to accommodate VP9 video and Opus audio. Matroska is similar in concept to other containers like AVI, MP4, or Advanced Systems Format (ASF), but is entirely open in specification, with implementations consisting mostly of open source software.
Associated programs VLC media player, MPlayer, K-Multimedia Player, Mozilla Firefox, Opera, Google Chrome, FFmpeg. VLC Media Player
Wiki https://en.wikipedia.org/wiki/WebM https://en.wikipedia.org/wiki/Matroska