You’ve probably come across a situation where you have a music file in one file format, such as MP3, but you need it to be an M4R or some other audio type. Instead of scouring the internet for an M4R version of the same file, you can just use an audio file converter to convert MP3 to M4R.

The same is true for other music file formats like OGG, WMA, M4A, and FLAC. An audio converter program can save one music file format to another so that the file will work in the program you’re using, the device on which you want to listen to it, etc.

Below is a list of hand-picked music converters that anyone can use to convert between various audio file formats. We’ve limited our selection to only the absolute best: they’re free, work on a variety of platforms, and do the job with zero confusion.

MediaHuman Audio Converter

Download Audio Converter from MediaHuman, and you’ll have a robust file converter for your music. This program — which works on Mac, Windows, and Ubuntu — sports so many features that you’ll be surprised it’s free.

Other features:

  • Converts to a huge variety of audio file formats
  • Import an entire folder of music at once
  • Convert a playlist from iTunes
  • Customize the output settings (e.g., bitrate and channels)
  • Several advanced program options, such as the option to exit the program after converting your music
  • Can auto-add your converted music to iTunes and even find cover art for you

Converted files can be saved to any folder you choose. There’s also an option in the settings to have all music files converted to the same folder as the source file.

Convertio

Instead of downloading a music converter to your computer to perform the conversion, you can do it all online with Convertio. It works on all operating systems and lets you upload multiple files at once from your computer, a URL, or your Google Drive or Dropbox account.

Other features:

  • 100 MB maximum file size
  • Save each song to a different file format or make them all the same
  • Trim the music before conversion
  • Adjust advanced settings like the codec, audio channels, and frequency; and even make the song louder or quieter
  • Convert two music files at once
  • Download more than one converted file at once through a Zip file

The music conversions you perform at Convertio can be saved back to your computer or imported into Google Drive or Dropbox.

You can pay for extra features like large uploads, more concurrent conversions, no ads, and unlimited file conversions.

Aconvert

Similar to Convertio, Aconvert is an online music file converter that can convert audio from your computer, a web address, your Dropbox account, or your Google Drive account. One difference between the two music conversion sites is that this one lets you convert files as large as 200 MB and doesn’t impose a two-song limitation for each conversion session.

The supported output formats for music conversions include: MP3, WAV, WMA, OGG, AAC, AU, FLAC, M4A, MKA, AMR, OPUS, and others.

Other features:

  • Change the audio bitrate and/or sample rate before the conversion
  • Convert several music files simultaneously
  • Really quick conversions
  • Lets you delete converted files when you’re done saving them
  • Creates a QR code from the download page for easy access via your phone or tablet

Music converted through Aconvert can be saved to your computer, Dropbox, or Google Drive.

Convertaudio

Another way to convert music files to other formats is with Convertaudio. It lets you upload files as large as 500 MB, add a fading effect to the beginning and/or end, and adjust the volume.

The formats your music can be saved to include MP3, WAV, M4R, FLAC, M4A, and OGG.

Unfortunately, only one song can be converted at once and online file storage services aren’t supported (i.e., you have to upload songs from your computer).

Freemake Audio Converter

Another downloadable song converter tool, Freemake Audio Converter runs on Windows to convert dozens of audio file formats to any of these: MP3, WAV, AIFF, FLAC, OGG, M4A, and WMA.

More features:

  • Bulk music conversions
  • Can join all the files into one song
  • Lets you customize advanced options
  • An Export to iTunes option is included
  • Edit the song titles before conversion

Tip: Learn how to batch rename MP3 metadata files if you need to do that, too.

You can choose where to save the converted music, but you’re limited to storing them on your computer only.