Selmo Labs / url to mp3
Give it a direct link to an audio file and it checks the file is really there, tells you what it is, lets you hear it, and saves it under a name you choose.
It doesn't convert anything. The link has to point at an audio
file already — an .mp3, .m4a, .wav and so on.
A page that merely plays audio, like a video or streaming site, won't work here.