You can save this page to your computer or download from the github link and run it locally. It works fine on Ubuntu/Firefox, but on windows you might need to run it under a portable server (like UWamp).
The best way to make this process your data is to export as CSV and copy-paste the contents to the top textbox. You're welcome to try loading the file by URL but no guarantees.
Warning: If you choose the "Print all columns" option, those columns that have the same title as 'name', or the amountVar(default: 'value'), ( or 'level' or 'subitems' if you have chosen to print metadata )...
will be overwritten. So try to name your columns differently.. avoid using 'name', 'value', 'subitems', 'level'.
Avoid naming your columns as 'parent' or 'children' too as most data-viz scripts use those and your data might get overwritten.
Just for the record, all data conversion, processing on this page is happening at your end (client-side) only. We can't and don't want to do anything with your data. Save the page to ur comp and run it without internet.