Convert MP3 to OPUS offline by JavaScript

Convert MP3 to OPUS offline

Convert local MP3 files to OPUS 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 MP3 to OPUS offline

Choose local MP3 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.

Name	MP3	OPUS
Full name	MPEG-1 or MPEG-2 Audio Layer III	Opus Audio Format
File extension	.mp3	.opus
MIME	audio/mpeg, audio/MPA, audio/mpa-robust	audio/opus
Developed by	Fraunhofer Institute	IETF codec working group
Type of format	Digital audio	Audio file format
Introduction	MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.	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.