[3 Ways] How to Convert YouTube MP4 to MP3

For offline listening, storage efficiency, device compatibility, etc., you may find yourself want to convert YouTube videos (MP4/FLV... format) into MP3 format. Converting MP4 to MP3 can be done through various methods, each offering different features and benefits.

In this article, we will explore three effective ways to convert YouTube MP4 files to MP3, as well as provide a bonus tip on how to transfer MP3 files from your PC to your iPhone using FoneTool.

Way 1. Convert YouTube MP4 to MP3 Online

Online converters are one of the simplest and most convenient ways to convert YouTube MP4 videos to MP3. These tools require no installation and can be accessed directly from your web browser.

In this guide, we’ll take Convertio as an example. Here’s how to convert YouTube MP4 to MP3 online via Convertio.

Step 1. Go to Convertio > Drag and drop the FLV file into the designated area or click the Choose Files button to upload from your computer.

Step 2. Select MP3 as the desired output format > Click the Convert button to initiate the conversion process.

Step 3. Once the conversion is complete, click the Download button to save the MP3 file to your computer.

Way 2. Convert YouTube MP4 to MP3 via Chrome Extension

Another efficient method to convert YouTube MP4 files to MP3 is by using a Chrome extension. Extensions are lightweight programs that can be added to your Chrome browser to enhance its functionality. It now also provides you with powerful function to achieve YouTube MP4 to MP3 conversion. Follow the steps below to know how to convert YouTube video to MP3 using a Chrome Extension.

Step 1. Go to your Google Chrome and visit Addoncrop YouTube Downloader > Click Add to Chrome and follow the instructions to add the Chrome extension.

Step 2. Navigate to the YouTube website and play the desired video > Click the MP3 Converter icon, which resembles a musical note.

Step 3. In the pop-up window, you can adjust the audio bitrate or trim the MP3 file as needed > Finally, click the Download button to save your MP3 file.

Way 3. Free Download YouTube MP4 to MP3 Converter

If you prefer an offline way to convert YouTube MP4 to MP3, there are a variety of file conversion software available. These programs often offer more features and control over the conversion process compared to online tools or browser extensions, which can also be a dedicated choice to convert YouTube MP4 to MP3.

Among kinds of MP4 to MP3 converts, we’d like to choose Aiseesoft Free Video Converter. Here’s how you can do.

Step 1. Download this free MP4 to MP3 converting software - Aiseesoft Free Video Converter from its official site. Then install and launch it.

Step 2. Click Add File(s) button to import the YouTube videos you want to convert to MP3.

Step 3. Choose MP3 from the drop-down list of Output Format. Then click Convert button to convert YouTube video to MP3.

Bonus: Transfer MP3 from PC to iPhone via FoneTool

Once you have successfully converted your YouTube videos to MP3, you may want to transfer these audio files to your iPhone for easy access and offline listening. FoneTool is a powerful tool that simplifies the process of transferring files between your PC and iPhone.

Step 1. Download and install FoneTool > Connect your iPhone to your computer using the USB cable and enter your iPhone password to trust the computer.

Step 2. Once connected, the home screen will automatically appear > Select Phone Transfer, then PC to iPhone, and click Start Transfer.

Step 3. Click the Music option and then use the File icon to add music from your computer to your iPhone, or drag and drop MP3 files directly into the box.

Step 4. Once all the MP3 files have been added, click the Start Transfer button to move the MP3 files from your computer to your iPhone.

Conclusion

That’s all for how to convert YouTube MP4 to MP3. Whether you choose to use an online converter, a Chrome extension, or dedicated software, each method has its own advantages and can cater to different needs and preferences.

Additionally, transferring your newly converted MP3 files to your iPhone is a breeze with the help of FoneTool. This software ensures that your audio files are readily available on your device, allowing you to enjoy your favorite content anytime, anywhere.

By following the step-by-step guides provided in this article, you can efficiently convert and manage your media files, making the most of the vast resources available on YouTube.