Convert MP3 to AAC offline by JavaScript

Convert MP3 to AAC offline

Convert local MP3 files to AAC 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 MP3 to AAC offline

Choose local MP3 files, choose "AAC" 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	AAC
Full name	MPEG-1 or MPEG-2 Audio Layer III	Advanced Audio Coding
File extension	.mp3	.aac
MIME	audio/mpeg, audio/MPA, audio/mpa-robust	audio/aac
Developed by	Fraunhofer Institute	Bell Labs, Fraunhofer Institute etc.
Type of format	Digital audio	Audio compression 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.	Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates. AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications.