Convert WEBM to M4A offline by JavaScript

Convert WEBM to M4A offline

Convert local WEBM files to M4A 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 WEBM to M4A offline

Choose local WEBM 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	WEBM	M4A
Full name	HTML5 Video	Audio-only MPEG-4
File extension	.webm	.m4a
MIME	video/webm, audio/webm	video/mp4
Developed by	Google	International Organization for Standardization
Type of format	Video file format	Media container
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.	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.