Review of the Top 3 Open Source Video Converter. 1. HandBrake ( Step 4: Click Start on the top to use HandBrake to convert MP4 to MP3 format. Part 8: How to Convert MP4 to MP3 with FFmpeg. FFmpeg can be your free MP4 to MP3 converter software as well. Just enter the following command line in FFmpeg. Later, you can extract MP3 from MP4 on multiplatform by using FFmpeg. Step 1: Free download, install and Read: Best free WebM to MP4 converter software for Windows. 9] Prism Video Converter Prism Video Converter from NCH software is free for personal or non-commercial use. CNET Download provides free downloads for Windows, Mac, iOS and Android devices across all categories of software and apps, including security, utilities, Free M4a to MP3 Converter. Free MP4 MP3 Converter. Free MP4 MP3 Converter is a powerful audio extractor extracting audio from video. It allows extracting MP4 (H.264/MPEG-4 AVC), MKV, OGG, VOB, AVI, WMV, 3GP, 3G2, WebM, RMVB, FLV, and QuickTime MOV video to MP3 easily. Key features: Batch-convert unlimited video files in the fast and easy setup interface; Extractor Video Step 1. Download and install this YouTube to mp3 converter on your computer then run it. Step 2. Go to YouTube, find the video or playlist you want to convert to mp3, then copy its link address. Step 3. Open the software, paste the URL into the program, and select “Convert to MP3” from the pop-up box. Step 4. As long as you find an interesting video on YouTube, just be free to paste its link in the converter tool, and then enjoy the fast and free YouTube video to MP4 conversion. Quick YouTube Link to MP4 First of all, using a YouTube to MP4 converter online tool to save YouTube video to computer as MP4 is a time-saver because it eliminates the need Download Free Any MP3 Converter for Windows to convert audio files between different formats and extract audio tracks from video. MP3 & Audio Software; Free MP4 to MP3 Converter (64-bit 3rZu4X.