M4A files from iTunes purchases, iPhone Voice Memos, and Apple GarageBand use AAC encoding in an MPEG-4 container — excellent quality, but not universally supported by older players and devices. This tool converts M4A to MP3 in your browser using the LAME encoder. No upload, no account, your audio stays private.
Drop files here
or browse to upload
Up to 200.0 MB per file
Upload your M4A file
Drop an M4A audio file. Common sources: iTunes music library, iPhone Voice Memos, GarageBand exports, Apple Podcasts downloads. Up to 200 MB.
Select bitrate
192 kbps is our default — high quality and compatible with everything. If you're converting voice memos or podcasts, 128 kbps is perfectly fine. For music you want to keep at the highest quality, use 256–320 kbps.
Convert
Click Convert. FFmpeg decodes the AAC audio from the M4A container and re-encodes to MP3 using LAME. Processing is fast — typically 2–5 seconds per minute of audio.
Download the MP3
The resulting MP3 works on all devices including older MP3 players, car stereos, and non-Apple hardware that doesn't support M4A.
M4A is an audio-only MP4 container file using AAC (Advanced Audio Coding) compression. Apple created M4A as the file extension for their AAC audio files to distinguish them from M4V (video). AAC is technically superior to MP3 — it achieves the same perceptual quality at lower bitrates — but MP3 has broader hardware support, especially in older devices.
No. DRM-protected M4P files (iTunes Store purchases from before 2009) cannot be decoded or converted by any standard tool without authorization. Apple removed DRM from their music catalog in 2009, and purchased music from that point forward is DRM-free M4A. If you have M4P files, you'd need to re-purchase or re-download them as DRM-free from Apple Music.
At 192 kbps, the conversion from AAC M4A to MP3 involves two lossy encoding steps (AAC decode → MP3 encode). This double-encoding introduces some quality loss. At 192 kbps, most listeners won't notice. If quality is critical, use 256–320 kbps to minimize generational loss. AAC at 256 kbps M4A → MP3 at 320 kbps is practically lossless in practice.
iPhone Voice Memos are stored as M4A files. To transfer them to your computer: on iPhone, tap the three-dot menu on a recording and choose "Share" → "Save to Files" → iCloud Drive or AirDrop to your Mac. On Mac, they save directly to ~/Library/Application Support/com.apple.voicememos.
Yes — if your playback device supports M4A. AAC at 256 kbps is audibly transparent (indistinguishable from lossless by most listeners), while MP3 needs 320 kbps to reach the same threshold. If you're only playing on Apple devices, keep M4A. Convert to MP3 only when you need to use the file on non-Apple hardware.
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