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M4A — what iPhones record voice memos in — plays fine on Apple devices and inconsistently elsewhere. Converting to MP3 makes recordings playable on literally everything: car stereos, old laptops, transcription services, court filing systems. Conversion runs locally; your recordings never touch a server, which matters for the kinds of conversations people record.
Frequently asked questions
Will converting M4A to MP3 lose quality?
Slightly in theory (both formats are lossy), inaudibly in practice at 192 kbps+ for voice recordings. For music in M4A, use 320 kbps to be safe.
How do I get the M4A off my iPhone first?
In Voice Memos, tap the recording → share → AirDrop/email/Files. Once it's on a computer, drop it here — the conversion itself stays on your device.