Convert M4A to MP3 online
Free, no sign-up, no limits. Drop your M4A files, get MP3 files back in seconds.
1 files converted so far
Drop your M4A files here
or · multiple files accepted
Local conversion: your files never leave your device.
Why convert M4A to MP3?
You have an iPhone voice memo, an iTunes purchase or a GarageBand recording and you want to play it in the car, send it to someone on Windows or add it to a video. MP3 plays everywhere; M4A does not.
How to do it, step by step
- Drop your M4A fileinto the area at the top of the page (or several files at once). On mobile, tap the area and pick the file from your apps.
- Check the output format: MP3 is already selected. For music, 192 kbps is transparent for most listeners and 320 kbps gives the maximum. For voice (memos, podcasts, lectures), 128 kbps is more than enough and halves the file size.
- Start the conversion.The FFmpeg engine loads once (≈ 10 MB), then each file is processed in a few seconds without leaving your device.
- Download your MP3, directly or as a .zip if you converted several files. The name and metadata (title, artist, cover art) are preserved.
The M4A format (MPEG-4 Audio)
M4A is Apple's audio container, used by iTunes, Apple Music, iPhone voice memos and Mac recordings. It usually holds AAC audio, sometimes ALAC (lossless). Very good quality at a small size, but poorly supported by some car stereos, MP3 players, Windows software and websites.
- Excellent quality at the same bitrate
- Native Apple format (iPhone, Mac, iTunes)
- Can hold lossless audio (ALAC)
- Limited compatibility outside the Apple ecosystem
- Rejected by many car stereos and older devices
- Less universal than MP3
The MP3 format (MPEG-1/2 Audio Layer III)
MP3 is the most universal audio format in the world. It plays on absolutely everything: car stereos, phones, TVs, game consoles, MP3 players, browsers, editing software. Its compression is slightly less efficient than AAC, but its total compatibility makes it the safe choice for sharing an audio file.
- Compatible with 100% of devices
- Small file size
- Patent-free since 2017
- Less efficient compression than AAC/Opus
- Irreversible quality loss at low bitrates
M4A vs MP3 comparison
| M4A | MP3 | |
|---|---|---|
| Compression | Lossy | Lossy |
| Typical size (1 min, music) | ≈ 1.2 MB (160k) | ≈ 1.4 MB (192k) |
| Common use | iPhone voice memos, iTunes purchases, GarageBand recordings, Mac Voice Memos | podcasts, music, car stereos, portable players, email attachments |
| Metadata (title, cover art) | Yes | Yes |
Frequently asked questions
Does converting M4A to MP3 lose quality?
MP3 is a lossy compressed format: a conversion always involves re-encoding. At 192 kbps or higher, the difference is inaudible in the vast majority of cases. Just avoid chaining several successive conversions.
Is the M4A to MP3 converter free?
Yes, with no limit on the number of files, no sign-up and no watermark. Each file can be up to 200 MB.
Are my M4A files uploaded to the internet?
No. The M4A to MP3 conversion is performed by FFmpeg directly in your browser (WebAssembly). Your files never leave your computer or phone.
How do I convert M4A to MP3 on iPhone or Android?
Open this page in Safari or Chrome, tap the drop area, select your M4A file (from Files, Voice Memos, Downloads or WhatsApp), then tap "Convert". The MP3 downloads to your files.
Can I convert several M4A files at once?
Yes, add all your files in one go. They are converted one after another and a button lets you download everything as a .zip archive.