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!
OUTPUT FILES:
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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. Use online converter instead if this offline converter doesn't work in your web browser.
| 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. |
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