i wouldn't recommend using websites to rip mp3s from youtube, as they more often than not promise far higher bitrate than what youtube actually provides (which is 128 kbps for mp3), or give you an improper mp3 (which the last one mentioned one does, an aac with a .mp3 extension)
heck, i wouldn't recommend grabbing audio from youtube at all, since they compress it a lot, and converting from a lossy format (mp3, aac, opus, etc.) will further damage the quality of the audio. getting a lossless source (flac, for example) would be much better, as you'll experience much less audio quality loss when converting from lossless to lossy.
if you must grab it from youtube, though, i would recommend learning to use
youtube-dl or
yt-dlp, as these programs are much more trustworthy than some random website.