iPhone ringtones are specific audio files with the M4R extension. iTunes has the option to convert MP3 to iPhone ringtone by right-clicking on a song, but this only works with certain songs purchased from the iTunes Store.
So, here’s how you turn your favorite songs into ringtones on your iPhone.
1. Download and open iTunes. Click on the app icon at the top of your toolbar and click “Preferences.”
At the bottom right, click “Import Settings.” At the top, click the icon to the right of “Import with: “AAC encoder” and choose Click “OK” twice to exit.
2. Right-click on the song you want to convert
Listen to the song, choose up to 40 seconds of the song as a ringtone. Referring to the bar at the top of the iTunes window, make a 40-second piece out of this track. Click “OK” to exit.
3. Right-click on the song and click “Get Info”. Click on “options”. Go to the “Start” and “Stop” time preferences in the middle of the page. These are the areas where you can reduce your fresh start and downtime. Click “OK”.
4. Right-click on the song and choose “Create AAC Version.” When you look at the information for your new clip, it will have the M4A file extension.
5. Find the new M4A shortcut outside of iTunes. For example, if you’re working on a Mac, you can right-click on the file and choose “Show in Finder.” On a PC, you can use “Search” in “My Computer”.
Remove the file .m4a extension. Retype M4R in a file name. Now you have an iPhone-compatible ringtone.
6. Open the file. M4R in iTunes. Plug your iPhone in and sync the ringtone.
Nothing hard, nothing extraordinary, just as simple as that!