N.B. Sometimes alltomp3.org website goes down so I added the links to downloads here.
Go to
https://github.com/AllToMP3/alltomp3-app/releases/
and download AllToMP3-Setup-x.x.x.exe
For Ubuntu < 16.04 (Xenial), Debian < 9 (Stretch), elementary OS and Linux Mint, your first have to install pathlib:
sudo pip install pathlib
Then, to install AllToMP3:
curl -s https://packagecloud.io/install/repositories/AllToMP3/alltomp3/script.deb.sh | sudo bash
sudo apt-get install alltomp3
You can then launch it via
alltomp3
or from your distribution launcher.
Note: on old distributions, the default version of ffmpeg might not support mp3. You may have to install a more recent version of it.
https://github.com/AllToMP3/alltomp3-app/releases/
and download AllToMP3-x.x.x.dmg file