How to Convert MP4 to MP3 on iPhone? How to Convert MP4 to MP3 on PC? Convert MP4 to MP3 for Free Online 1. Open Unconverted. Click on “Add Files” icon on the screen and upload the MP4 file that you want to convert to MP3 from the computer. Or you can directly 2. Open Converter4 iPhone. 3. Click the Convert button. 4. You will see the screen with a list of the files. Click the next button to proceed to the next screen. 5. Select MP3 as the file type. 6. Click the Convert button. 7. The MP3 file will now be downloaded or placed in the Downloads folder. 8. Now you can share your MP3 with your friends directly through their web browsers. Download our mp3 converter for free from the above website. Convert mp4 to mp3 on Windows? 1. Click on the Start Button > Windows Task Manager > Stop Task. 2. Type C:WINDOWSCOMPUTERLIVEACCOUNTSEXEC to open the explorer: 3. Now select the folder called “computername.mov”. 4. Open Converter4 by double-clicking the MP3 Converter or just press the Open button and the MP3 files may be opened. How to convert mp4 to mp3 on Mac? 1. Open Unconverted. Click on “Add Files” icon on the screen and upload the MP4 file that you want to convert to MP3 from the computer. Or you can directly 2. Drag and drop your mp4 to the Convert MP3 from the Finder menu. 3. Click the Concatenate button. 4. The mp3 file will now be downloaded or placed in the Downloads folder. 5. Now you can share your mp3 with your friends directly through their web browsers. Download our mp3 converter for free from the above website. Convert MP4 to MP3 for Free Online ‛ 1. Open Converter4 by double-clicking the MP3 Converter or just press the Open button and the mp3 files may be opened.