YouTube Downloader Converter is a very powerful web video downloading tool, which integrates video download, conversion and playback in one place. It can help us easily download videos in various formats and definitions (quality) from thousands of video websites such as YouTube, Vimeo, MyVideo, etc., allows to directly convert the downloaded video into audio or other video formats, and allows to play them directly from the built-in media player.

There are so many high-quality videos on YouTube that are worthy of downloading for collection or need to be downloaded for enjoyment later due to poor Internet connection speed. There are usually 4 approaches to do this:

1. Online tools: it's efficient and simple, without downloading and installing; but their function is simplex, and only supports a few resolutions;
2. Browser plug-ins: it has similar pros and cons with the former;
3. Desktop software: it requires downloading and installing software, with relatively powerful functions;
4. Command lines: very powerful, but requires some prior configurations, and difficult for beginners to use.

4K YouTube to MP3 is a simple and practical video to audio conversion tool (its essence is to extract and save the audio track file from video) for Windows, Mac and Linux platforms. It can easily download video from all the popular media websites (such as: YouTube, SoundCloud, Vimeo, Dailymotion, Facebook, Flickr, Metacafe, and Tumblr), then automatically convert the video to MP3/M4A/OGG format of audio file and save to local disk.