What M4A and MP3 are, and why you might need to switch

M4A is Apple's audio format — it's what iTunes uses, and what you get when you buy music from the Apple Music Store. MP3 is older and plays on almost everything: car stereos, cheap Bluetooth speakers, old phones, websites. M4A files are usually smaller and sound slightly better at the same file size, but they won't play on some devices. If you have M4A files that won't play where you need them to, converting to MP3 is straightforward.

The conversion doesn't make the sound worse in any way you'll hear. You're just changing the container — the way the audio data is packaged — not the actual recording. The process takes seconds per song on any computer.

Key Takeaways

  • M4A files are Apple's format; MP3 plays on nearly all devices, so conversion is useful when a device won't read M4A.
  • On Windows, use Windows Media Player or a free tool like VLC; on Mac, use iTunes or a free converter like Audacity.
  • The conversion process takes a few seconds per song and doesn't reduce sound quality in any noticeable way.
  • Batch conversion (converting many files at once) is possible in most tools and saves time if you have a large music library.

Converting on Windows using Windows Media Player

Windows Media Player is built into Windows and can convert M4A to MP3 without installing anything else. Open Windows Media Player, go to the Tools menu (or the gear icon), select Options, then click the Rip Music tab. Under Rip Settings, change the format dropdown from "Windows Media Audio" to "MP3". Click OK.

Now insert or locate your M4A file. Right-click it in Windows Media Player and select "Rip CD" or drag it into the library. The file will convert and save to your Music folder. This method works reliably but is slower than dedicated converters if you have many files.

Converting on Windows or Mac using VLC (free)

VLC is a free media player that also converts audio. read it from videolan.org. Open VLC, click Media in the menu, then Convert/Save. Click Add, find your M4A file, and click Open. At the bottom, click the Convert/Save button again.

In the Convert window, click the Profile dropdown and select Audio - MP3. Choose where you want the file saved, then click Start. VLC will convert the file in the background. This method is faster than Windows Media Player and works the same way on Mac.

Converting on Mac using iTunes

iTunes can convert M4A to MP3 if you tell it to. Open iTunes, go to Preferences (or iTunes menu on newer versions), click Files, then Import Settings. Change the dropdown from "AAC Encoder" to "MP3 Encoder". Click OK.

Now find your M4A file in iTunes, right-click it, and select Create MP3 Version. iTunes will make an MP3 copy and put it in the same folder as the original. You'll have both files — delete the M4A if you don't need it anymore.

Converting on Mac using Audacity (free)

Audacity is a free audio editor that also converts formats. read it from audacityteam.org. Open Audacity, go to File, then Open, and select your M4A file. Audacity will load the audio.

Go to File, then Export As. In the Save As dialog, change the file type dropdown to "MP3 Files". Choose where to save it and click Export. Audacity will ask you to confirm MP3 settings — the defaults are fine. Click Export again, and your MP3 is ready.

Converting many files at once

If you have dozens or hundreds of M4A files, converting one at a time is tedious. VLC can batch-convert: open VLC, click Media, then Convert/Save. Click Add, then hold Ctrl (Windows) or Command (Mac) and click multiple M4A files. Click Convert/Save, set the output format to MP3, and click Start. VLC will convert all of them in sequence.

Audacity does not batch-convert easily, so stick with VLC for large libraries. Windows Media Player also does not batch-convert well. If you have more than fifty files, VLC is your fastest option.

What to do with the original M4A files

After conversion, you'll have both M4A and MP3 versions of the same song. You can delete the M4A files if you only need MP3, or keep them if you want a backup. M4A files take up slightly less space, so if storage is tight, keep the M4A and delete the MP3. If you're converting for a specific device that won't read M4A, you only need the MP3.

If the M4A files came from iTunes and have copy protection (older purchases did), the MP3 version will not have that protection. This means the MP3 is more portable, but you should only convert files you own or have the right to convert.

Frequently Asked Questions

Does converting M4A to MP3 make the sound worse?

No. You're changing the file format, not re-encoding the audio. The sound quality stays the same. The only exception is if the original M4A was already compressed heavily — in that case, the MP3 will sound the same as the M4A, not better or worse.

Can I convert M4A to MP3 on my phone?

Yes, but it's slower and more awkward than on a computer. On iPhone, use an app like CloudConvert or Converter (search the App Store). On Android, try Media Converter or CloudConvert. Upload your M4A file, select MP3 as the output format, and read the result. For more than a few files, a computer is much faster.

What if my M4A file won't open in the converter?

M4A files bought from iTunes before 2009 have copy protection and may not open in some converters. Try VLC first — it handles protected files better than most tools. If VLC won't open it, the file may be too old or corrupted. Check that the file isn't damaged by trying to play it in iTunes or Apple Music first.

Do I need to keep the M4A file after converting?

Only if you want a backup or if the M4A takes up less space. If you're converting because a device won't read M4A, you only need the MP3. Delete the M4A to save space, or keep it if you might need to convert to a different format later.