The same is not true in reverse: Once an MP3 has been created (and parts of the original audio information discarded in the compression process), you can’t get it back by converting it to MP4/ALAC. Steps for Online Conversion. Visit a trusted online MP4 to MP3 converter website. Upload the MP4 file using the platform's interface. Select MP3 as the desired output format and adjust settings if available. Initiate the conversion and wait for the process to finish. Download the converted MP3 file to your device. mp3. MP3 Audio Format. Is the most common format for storing audio. Almost any player on any platform can open mp3 files. The audio is compressed with loss of quality, but the loss is negligible for the typical user, and the file size is usually less than that of the original files. Step 2 – Select the File to Convert. Next, open your file. You can either double-click it in Windows Explorer, or you can click the File tab and choose the Open option. From here, just navigate to the place where your file is and click it again. The file should start to play. These free tools allow you to convert MP4 files to MP3 files. The MP3 format can be downloaded when you upload the original MP4 file and click the convert button. As an alternative, you can open Windows Movie Maker, and upload and save the MP4 file as an MP3 file. To convert an MP4 video file to MP3 audio on Windows for free, you can use free software, Microsoft Store apps, and/or online MP4 to MP3 converter tools. We have created a list of such tools for for Windows. Switch is one of the most stable, easy-to-use, and comprehensive multi format audio file converters available. Convert WMA, WAV, CDS, AIFF, MPEG, AVI and more to MP3 files or convert MP3 files to another audio format. Download Switch MP3 File Converter for Windows. Convert or compress MP3 files quickly and easily. Select a video from your device and it will convert mp4 to mp3 without needing to download any software to your computer. The process may take some time, depending on the size of the video file. Once completed you will have a music file without the video. Select a file with audio to convert. Conversion Format. Step 2. With the MP4 video selected in the project library, click the Share button to the top right corner in iMovie > select File option > set the Format to Audio Only and File Format to MP3. Step 3. Click Next > rename your file name and location for saving the MP3 audio > click Save. Done. First you need to add file for conversion: drag and drop your MPEG4 file or click the "Choose File" button. Then click the "Convert" button. When MPEG4 to MP3 conversion is completed, you can download your MP3 file. ⏱️ How long does it take to convert MPEG4 to MP3? gAN3YU.