Convert M4A audio files to universally compatible MP3.
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M4A is Apple's audio format — used by iTunes, Apple Music, and iPhone voice memos. Converting to MP3 makes your audio play on any device, including older MP3 players and car stereos.
M4A is Apple's default audio format — used by iTunes, Apple Music, and iPhone voice memos. It's based on AAC and is more efficient than MP3, but many older devices (car stereos, MP3 players, some phones) only support MP3. Converting to MP3 makes your audio play everywhere.
| Input format | M4A (AAC in MP4 container) |
| Output format | MP3 |
| Bitrate range | 128-320 kbps |
| Default bitrate | 192 kbps |
| Encoder | LAME |
| Metadata | Preserved (ID3 tags, album art) |
| Channels | Preserved (mono/stereo) |
| Max file size | 50 MB per file |
| File retention | Auto-deleted after conversion |
The converter decodes the M4A audio and re-encodes it as MP3 using LAME at a high-quality bitrate (192 kbps default). Metadata (artist, album, cover art) is preserved. The output plays on any MP3-compatible device.
At 192 kbps (default), most listeners can't distinguish MP3 from the original M4A. At 320 kbps, the conversion is essentially transparent. For voice memos, 128 kbps is sufficient.
Last reviewed: 2026-10-01