POST JS WITH PYTHON TO BYPASS CORS sudo pip3 install Flask flask-cors --user pip3 install Flask flask-cors --user 1 upload index.html + data.js to /var/www/html/target_folder/ 2 run python3 server.py 3 open firefox + F12(network/console): 4 open : http://localhost/target_folder/index.html and click send (watch console)