Convert MP3 to M4A offline
Convert local MP3 files to M4A 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 M4A offline
Choose local MP3 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 | MP3 | M4A |
| Full name | MPEG-1 or MPEG-2 Audio Layer III | Audio-only MPEG-4 |
| File extension | .mp3 | .m4a |
| MIME | audio/mpeg, audio/MPA, audio/mpa-robust | video/mp4 |
| Developed by | Fraunhofer Institute | International Organization for Standardization |
| Type of format | Digital audio | Media container |
| 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. | 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. |
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