I've tried way too many YouTube to MP3 sites over the years, and most of them are either covered in sketchy pop-ups or quietly cap you at terrible audio quality. Last week a friend sent me youtubemp3hub and honestly it's become my go-to. You just paste a video link, pick your bitrate (128, 192, 256, or 320 kbps), and it spits out a clean MP3 in seconds. What I really appreciate is that it works the same on my phone and my laptop, so if I'm on the train and want to save a track before I lose signal, I can. No app to install, no account to create. If you still download audio from YouTube now and then, give youtubemp3hub.com a look. It's the first one of these tools I haven't unbookmarked after a week.