Convert OPUS to M4A offline by JavaScript

Convert OPUS to M4A offline

Convert local OPUS files to M4A files offline by JavaScript in your web browser without any software downloads or file uploads!

Files:

Target:

Audio bitrate:

Sample rate:

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OUTPUT FILES:

#	File Name	File Size	Actions

How to convert OPUS to M4A offline

Choose local OPUS files, choose "M4A" 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	OPUS	M4A
Full name	Opus Audio Format	Audio-only MPEG-4
File extension	.opus	.m4a
MIME	audio/opus	video/mp4
Developed by	IETF codec working group	International Organization for Standardization
Type of format	Audio file format	Media container
Introduction	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.	MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files.