M4A files play on Apple devices and some music services, but MP3 works on almost everything — here's how to convert between them

M4A is Apple's audio format, used by iTunes, Apple Music, and devices like iPhones and iPads. MP3 is older and more universal — it plays on car stereos, older phones, some smart speakers, and basically any device with a speaker. Converting M4A to MP3 means your audio file will work in more places, though the file size usually stays about the same.

You have three main routes: use free software on your computer, use an online converter, or use your phone's built-in tools. Which one works best depends on how many files you need to convert and what devices you already own.

Key Takeaways

  • M4A files are Apple's format; MP3 is universal and plays on almost any device with audio playback.
  • Desktop software like VLC (free, Windows and Mac) or foobar2000 (free, Windows) converts M4A to MP3 without uploading your files to the internet.
  • Online converters like CloudConvert or Online-Convert work in your browser but require uploading your file to their server.
  • Mac users can convert directly in iTunes or Finder by changing the import settings, then exporting the file in MP3 format.
  • The converted MP3 file will sound the same as the original M4A, though both formats compress audio and lose some quality compared to uncompressed formats.

Converting on Windows using free desktop software

VLC is the easiest free option for Windows. Download it from videolan.org, install it, then open VLC and go to Media > Convert/Save. Click Add, select your M4A file, then click Convert/Save again. In the Profile dropdown, choose Audio - MP3, pick where you want to save the file, and click Start. VLC will create an MP3 version in the folder you chose.

If you have many files to convert, foobar2000 (foobar2000.org) is faster. Install it, then right-click your M4A file in Windows Explorer, choose Open With > foobar2000, and go to File > Convert. Select MP3 as the output format and choose your destination folder. Foobar2000 can batch-convert multiple files at once if you select them all before opening the program.

Both programs keep your files on your computer — nothing is uploaded to the internet, so your audio stays private. The conversion takes a few seconds per file, depending on the file's length.

Converting on Mac using iTunes or Finder

Mac users can convert M4A to MP3 without installing anything extra. Open iTunes (or Music on newer Macs), go to Preferences > Files, and look for the Import Settings section. Change the dropdown from "AAC Encoder" to "MP3 Encoder" and click OK.

Now right-click your M4A file in iTunes, select Create MP3 Version, and iTunes will make an MP3 copy in the same folder as the original. Change the import settings back to AAC when you're done, so future imports use the original format.

On newer Macs running Monterey or later, you can also use Finder. Right-click the M4A file, choose Open With > Automator, then create a new Quick Action that converts using the built-in audio tools. This is more technical, so the iTunes method is usually simpler.

Using online converters for quick one-off conversions

If you don't want to install software, CloudConvert (cloudconvert.com) and Online-Convert (online-convert.com) let you convert in your browser. Go to the site, click Upload File, select your M4A file, choose MP3 as the output format, and click Convert. The site will download the MP3 to your computer when it's ready.

The trade-off is that your file is uploaded to their server while it converts. Most reputable converters delete files after a few hours, but if your audio contains private information or you prefer not to upload anything, use desktop software instead. Online converters are useful for one or two files when you're on a computer that doesn't have conversion software installed.

Some online converters have file size limits — usually 500 MB to 2 GB depending on the site. Check the limit before uploading a very long audio file.

Converting on iPhone or iPad

iOS doesn't have a built-in M4A to MP3 converter, but the Ferrite Recording Studio app (free version available) can import M4A files and export them as MP3. Open Ferrite, create a new project, import your M4A file, then go to Share > Export and choose MP3 as the format.

Alternatively, use the Shortcuts app (built into iOS). Open Shortcuts, create a new shortcut, add an action to convert audio format, select your M4A file, choose MP3, and run the shortcut. This method is free but requires a few taps to set up the first time.

Both methods keep the file on your device — nothing is uploaded. The converted MP3 will appear in your Files app or in the app you used to convert it.

Understanding what happens during conversion

M4A and MP3 are both compressed audio formats, meaning they remove some sound information to make the file smaller. When you convert M4A to MP3, you're not recovering any lost quality — you're just changing the container and codec (the method used to compress the audio). The MP3 will sound the same as the M4A because both formats discard the same information.

The file size usually stays similar or gets slightly smaller, depending on the bitrate (quality level) you choose during conversion. Most converters use 192 kbps or 320 kbps for MP3, which is high enough that most people can't hear a difference from the original. If you want to preserve the highest possible quality, choose 320 kbps if your converter offers it.

If your M4A file was protected by Apple's DRM (Digital Rights Management) — meaning you bought it from iTunes and it has copy protection — most converters will refuse to convert it. This is intentional: Apple's protection prevents unauthorized copying. You can only convert DRM-protected files if you own them and have already removed the protection through Apple's official channels.

Choosing the right method for your situation

Use desktop software (VLC or foobar2000) if you're converting many files or want to keep everything on your computer. Use an online converter if you're converting one or two files and don't mind uploading to the internet. Use iTunes on Mac if you already have the program open and want the fastest route. Use a phone app only if you need to convert on the go and don't have access to a computer.

All methods produce the same quality MP3 file — the difference is convenience and privacy. Desktop software is the most private; online converters are the most convenient if you don't have software installed.

Frequently Asked Questions

Will the MP3 sound worse than the M4A?

No. Both formats compress audio the same way, so converting between them doesn't add any new quality loss. The MP3 will sound identical to the M4A because you're not re-compressing — you're just changing the format. The only exception is if you choose a much lower bitrate (like 128 kbps) during conversion, which would reduce quality.

Can I convert DRM-protected iTunes purchases?

Not directly. If you bought music from iTunes before 2009, it has copy protection that prevents conversion. Apple removed DRM from new purchases, so anything you bought recently can be converted. If you own protected files, you can burn them to a CD in iTunes, then re-import the CD as MP3, but this is time-consuming for large libraries.

How long does conversion take?

Usually a few seconds per file on any modern computer. A 5-minute song typically converts in 5 to 10 seconds. Batch converting multiple files takes longer — roughly one file per 10 seconds, depending on your computer's speed and the file length.

Do I need to delete the original M4A file after converting?

No. The conversion creates a new MP3 file and leaves the M4A untouched. You can keep both, delete the M4A to save space, or delete the MP3 if you decide you don't need it. Most people keep the original M4A in case they need to convert to a different format later.

What if the online converter won't accept my file?

Check the file size limit — most converters have a maximum, usually 500 MB to 2 GB. If your file is smaller, try a different converter site. If multiple sites reject it, the file may be corrupted or protected. Try opening it in VLC or iTunes first to confirm it plays correctly.