How to Convert CAF to MP3 Online

By Jason Savage

The Core Audio Format is native to Apple's OS X and iOS platforms. Although the CAF format offers certain advantages over similar loss-less audio file formats, it has not spread far beyond its native platform. As of 2011, there are very few Windows-native audio file players or other utilities that can play CAF files. However, Windows users occasionally find themselves with a CAF file they want to hear, leading them to look for a way to convert the file to a format more amenable to their platform, such as MP3. Rather than downloading an application to convert CAF files, some people use a free, online service called to quickly convert CAF files to MP3.

Step 1

Launch your Web browser of choice. When it loads, go to This free service converts media files such as audio, video and image files to other formats and automatically uploads them to the user's computer. It is one of few such services that can convert CAF files to other formats, including MP3.

Step 2

Open the drop-down menu labeled "Audio converter" and select "Convert to MP3." You are taken automatically to the MP3 conversion page. If your browser doesn't go there automatically, click the "Go" button next to the drop-down menu.

Step 3

Click the "Choose File" button. A pop-up file browser dialog appears. Find the CAF file you want to convert to MP3 in the browser and double-click it. The file name will appear next to the "Choose File" button, indicating that is ready to convert the file.

Step 4

Use the drop-down menus in the "Optional settings" section of the page to establish quality parameters. The default settings will preserve the frequency and number of channels of the CAF file, but some users may want to change them. A frequency of 41,000 Hz will conform the file to the standard used on compact disks, for example. If the CAF file is in stereo and you want to convert it to mono, select "Mono" from the "Change audio channels" drop-down menu.

Step 5

Put a checkmark in the box labeled "Normalize audio" to normalize the volume of the file.

Step 6

Click the "Convert file" button. The CAF file is automatically uploaded to and the conversion is performed on their servers. When the conversion is complete, a prompt appears asking you to download the resulting MP3 file.

Step 7

Select a location in the file browser pop-up and click "OK" to download the MP3 file. Your Web browser downloads the file as normal.

Step 8

Use your audio file player of choice to play the MP3 file. Because MP3 is a "lossy" format, the sound quality will likely be somewhat degraded in comparison to the original CAF file, which is loss-less.