Convert MKV to OPUS offline by JavaScript

Convert MKV to OPUS offline

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

Files:

Target:

Audio bitrate:

Sample rate:

Show conversion logs

OUTPUT FILES:

#	File Name	File Size	Actions

How to convert MKV to OPUS offline

Choose local MKV files, choose "OPUS" as target audio 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	MKV	OPUS
Full name	Matroska Video	Opus Audio Format
File extension	.mkv, .mk3d, .mka, .mks	.opus
MIME	video/x-matroska, audio/x-matroska	audio/opus
Developed by	www.matroska.org	IETF codec working group
Type of format	Container format	Audio file format
Introduction	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.	Opus is a lossy audio coding format developed by Xiph and standardized by the IETF, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low end ARM3 processors.