M4A to MP3 Converter

Convert M4A audio files (from iTunes or iPhone) to universal MP3 format.

Drop your M4A file here

or click to browse

MP3 Quality

How to Convert M4A to MP3

Select your M4A file - Click the drop area or drag and drop. Voice memos, iTunes purchases, and GarageBand exports all work.
Preview (optional) - Listen to your audio before converting to make sure it is the right recording.
Pick a quality - 192 kbps suits most music. Drop to 128 kbps for voice recordings or bump to 320 kbps for maximum fidelity.
Convert and download - The conversion runs in your browser and the MP3 downloads straight to your device.

Why M4A Files Don't Play Everywhere

M4A is the container Apple uses for AAC audio. It is the default for iPhone Voice Memos, iTunes Store purchases, and GarageBand exports, and on Apple hardware it works flawlessly. The trouble starts the moment an M4A leaves that ecosystem: older car stereos, budget MP3 players, some Windows applications, many transcription services, and plenty of web upload forms either reject the file or fail silently. MP3 has none of those problems. After three decades it remains the one audio format that every device, every operating system, and every piece of software can play, which is exactly why converting to it is still worth doing.

AAC (M4A) vs MP3 at a Glance

Feature	M4A (AAC)	MP3
Developed by	MPEG group, adopted by Apple in 2003	Fraunhofer Institute, released 1993
Compression	More efficient: better sound at the same bitrate	Less efficient, needs a higher bitrate to match
Compatibility	Apple devices, modern software	Effectively everything ever made
Typical source	Voice Memos, iTunes, GarageBand	Downloads, podcasts, old music libraries
Best when	Staying inside the Apple ecosystem	Sharing, uploading, or playing on unknown hardware

The honest summary: AAC is the technically better codec, and MP3 is the practically better format. A 256 kbps M4A genuinely sounds a touch better than a 256 kbps MP3. But sound quality you cannot play is worth nothing, and MP3's universal support is why this conversion exists.

What Each Bitrate Means for File Size

Bitrate is the trade between file size and fidelity. Here is what a typical 4 minute song works out to at each setting, next to its usual iTunes source file:

Source M4A 256 kbps

7.5 MB

MP3 320 kbps

9.4 MB

MP3 192 kbps

5.6 MB

MP3 128 kbps

3.8 MB

Sizes scale with length: an hour-long voice memo at 128 kbps lands around 56 MB, while the same hour at 320 kbps would be 140 MB.

Converting iPhone Voice Memos

Voice Memos is the single biggest source of M4A files people need to convert. The app records mono AAC, and while the recordings play fine on your phone, they cause friction everywhere else: transcription services that only accept MP3 or WAV, court and HR systems with strict format requirements, Android group chats, and podcast editors expecting standard inputs. To get the file here, open the memo, tap the share icon, and save it to the Files app or email it to yourself. For spoken word, converting at 128 kbps keeps the file small with no meaningful loss, since the source recording is voice-optimized to begin with.

Frequently Asked Questions

Will converting M4A to MP3 reduce the audio quality? Slightly, because both formats use lossy compression and re-encoding always discards a little detail. In practice, converting a typical 256 kbps iTunes M4A to a 192 or 320 kbps MP3 sounds identical to almost every listener on almost every speaker. Quality loss only becomes audible if you convert at a low bitrate or re-convert the same file repeatedly.

Can I convert songs I bought from iTunes? Music purchased from the iTunes Store since 2009 is sold DRM-free and converts without any trouble. The exception is Apple Music: streaming downloads are protected M4P files, not open M4A, and no converter can legally or technically unlock them. If a file refuses to decode, check whether it came from an Apple Music subscription rather than a purchase.

Does this work with iPhone Voice Memos? Yes, and it is one of the most common uses for this tool. Voice Memos saves recordings as M4A. Share the memo to the Files app or email it to yourself, then load it here to get an MP3 you can send to transcription services, upload to older systems, or share with anyone whose software chokes on M4A.

Which bitrate should I pick? 192 kbps is the sensible default: near-transparent quality at a moderate file size. Choose 320 kbps if the source is high quality music and storage does not matter, or 128 kbps for voice recordings, lectures, and audiobooks where small files beat fidelity.

Does my audio file get uploaded anywhere during conversion? No. The decoding and MP3 encoding both run as JavaScript inside this page, on your own device. You could disconnect from the internet after the page loads and the conversion would still complete. Nothing is transmitted, stored, or logged on our end.

Is there a file size or length limit? The only limit is your device's memory, because the whole file is decoded into RAM before encoding. Desktop browsers comfortably handle album-length files. On phones, very long recordings (multi-hour meeting audio, for example) may fail on older devices; splitting the recording first is the workaround.