QR Code Tools
modified from this site
Installing
sudo apt install -y qrencode #encoding tools
sudo apt install -y zbar-tools # decoding tools
sudo apt install -y qtqr #graphical encoder
Terminal
Encoding
qrencode -o webURL.png 'https://linuxcommando.blogspot.com/'
Decoding
zbarimg webURL.png
zbarimg -q webURL.png # only output result
zbarimg -v webURL.png #verbose mode
GUI
run qtqr. the menu system is quite intuitive.