Visit the Make Your Own Ringtone website or use the Android Ringtone Maker or Syncios iPhone Ringtone mobile applications to create ringtones. To create a ringtone using the Android Ringtone Maker application, download it to your smartphone, and open the app. Select an audio file from the music library on the phone, and move the slider control to isolate the parts of the audio you would like to use as a ringtone.
To create a ringtone using the Syncios iPhone Ringtone Maker, download the program to your computer, install and open it. Choose Ringtone Maker in the menu on the left, click Open file, and choose the file. Press the Set Start and Set End buttons to create the ringtone, or type the start and end time manually in the boxes. Click Save, and select the folder where you want to store the ringtone.
To create a ringtone on Make Your Own Ringtone, go to the website, click Upload Files, and select the audio files that you want to use to make a ringtone. The website supports several formats, including AAC, FLAC, M4A, MP3 and OGG. Slide the markers to set them on cut off points in the audio, and press Play to listen to the ringtone. To save the ringtone, select the format in which you would like to save it; select M4A if you have an iPhone, or MP3 for most other phones. Press Make Ringtone to finish.