Convert M4A to MP3
Convert Apple/iTunes M4A audio to universal MP3. Compatible with all players and devices. Free, in your browser.
.m4a · up to 100 MB
Why convert M4A to MP3
From the Apple ecosystem to the universal standard
Universal compatibility
M4A doesn't work on all devices. MP3 works on absolutely all — car stereos, legacy players, Android.
Total privacy
Your audio never leaves your device. FFmpeg.wasm processes everything locally, no server uploads.
Quality preserved
Conversion at 192 kbps with libmp3lame: minimal degradation when re-encoding from high-quality AAC.
Instant after first load
The FFmpeg engine downloads once and is cached. All subsequent conversions start immediately.
How it works
Three steps, no hassle
Select your M4A file
Drag or select your .m4a file — an iTunes download, iPhone Voice Memo, or Apple recording. No registration required.
Conversion with libmp3lame
FFmpeg.wasm decodes the AAC from the M4A container and re-encodes the audio to MP3 at 192 kbps. Everything happens on your device.
Download your MP3
The resulting MP3 works in any player, device, or platform, including those that don't support M4A.
FAQ
Got questions?
M4A is the MPEG-4 audio format that uses the AAC (Advanced Audio Coding) codec inside an MP4 container. Apple popularized this format with iTunes in 2003. The .m4a extension distinguishes audio-only files from MP4 video files (.mp4 or .m4v). It is the standard format for iTunes Store downloads, iPhone Voice Memos, and Apple Music.
M4A/AAC does not have universal support: many older car players, home audio equipment, low-end Android devices, and some video editing software do not play it correctly. MP3 is the only format that works on absolutely all devices and platforms without exception.
AAC (the codec inside M4A) is technically superior to MP3 at the same bitrate. Converting AAC to MP3 involves lossy-over-lossy re-encoding. However, if the original M4A is high quality (256 kbps, like iTunes Store downloads) and is converted to MP3 at 320 kbps, the additional degradation is minimal and imperceptible to most listeners.
Yes. The iTunes Store sells music in M4A/AAC format at 256 kbps without DRM (since 2009, when Apple removed DRM from songs). Before 2009, iTunes downloads used M4P (AAC protected with FairPlay DRM), which CANNOT be converted. Only DRM-free M4A files can be converted freely.
Yes. The iPhone's Voice Memos app records audio in M4A format with the AAC codec. When you transfer voice recordings from your iPhone to your computer, the files have a .m4a extension. Converting these memos to MP3 is useful for sharing them with people using non-Apple devices or for using them in editing software that prefers MP3.
No. Apple Music files you download for offline listening are protected with FairPlay DRM (Digital Rights Management). These protected M4P files cannot be converted to MP3 or any other format with standard tools. Only DRM-free M4A files (such as iTunes Store purchases or personal recordings) can be converted freely.
M4A to MP3: AAC history (MPEG group, 1997), M4A vs MP4 container, Apple ecosystem audio formats, and iTunes Store history
AAC (Advanced Audio Coding) was developed by the MPEG (Moving Picture Experts Group) group and standardized in 1997 as part of the MPEG-2 specification, with additional improvements in MPEG-4. The codec was designed as a successor to MP3 with better efficiency: at 128 kbps, AAC achieves quality comparable to MP3 at 192 kbps. Major contributors to AAC's development include Fraunhofer IIS, Dolby Laboratories, Sony, Nokia, and AT&T Bell Laboratories. Apple adopted AAC as the primary format for iTunes in 2003, when it launched the iTunes Music Store.
The distinction between M4A and MP4 is technically minor but practically important. Both are MPEG-4 containers: M4A indicates audio-only content (AAC), while MP4 generally indicates video content. This distinction was introduced by Apple so that audio-only players could correctly identify files without attempting to play video. The MPEG-4 container itself was derived from Apple's QuickTime format, which in turn was based on the ISO Base Media File Format from the MPEG group.
The iTunes Store transformed the music industry when it launched in April 2003, selling songs for 99 cents in AAC format with FairPlay DRM protection. In 2009, Apple removed DRM from the entire library in the so-called 'iTunes Plus' initiative, converting files to standard M4A/AAC at 256 kbps that can be handled freely. iPhone Voice Memos, introduced in iPhone OS 3.0 in 2009, also use M4A as the recording format. Today, the Apple ecosystem — iPhone, iPad, Mac, Apple Watch — generates millions of M4A files daily through voice recordings, music imports, and App Store downloads.