Here is a way to “export” a Wunderlist list as a JSON Array:
- Open your favorite and up to date browser
- Login into Wunderlist
- Select one of your list
- Open your browser Developer Console
Array.from(document.getElementsByClassName("taskItem-titleWrapper-title")).map(item => item.innerHTML)and press Enter
- Right click on the printed object then click on “Copy Object”
As it’s based on the CSS Class name of a list item it might change in the future, if that does not work just check what is the new CSS class.
Tested with Firefox 67.0.1, on June 13th 2019.