How to use M4A to MP3
- Choose or drop your M4A or AAC files.
- Pick 128, 192 or 320 kbps. Tick Mono for voice recordings.
- Press Convert to MP3 and download the files.
Questions
Which bitrate should I choose?
192 kbps is a good default for music. 128 kbps is fine for speech and podcasts, and Mono halves the size again. 320 kbps is the maximum MP3 quality.
Does converting improve quality?
No. Converting between lossy formats can't add detail; choose 192 kbps or higher to avoid losing more.
Can I convert iPhone voice memos?
Yes. Voice memos are M4A files. Share them from the Voice Memos app to Files, then choose them here.
Is my audio uploaded to a server?
No. The tool runs in your browser and works on your audio directly on your device. Nothing is sent to us or anyone else, which is why it also keeps working if your connection drops after the page loads.
Is M4A to MP3 free?
Yes. There's no sign-up, no watermark and no daily limit. The only limit is your device's memory, which matters only for very large files.
Last updated 13 November 2026.