EasyEDA support import KiCAD v4.06 and greater version KiCAD files, if the KiCAD files version less then v4.06, please open them at the latest KiCAD and save as a new one, and then import them.
The KiCAD file needs to be compressed as zip file before import.
The zip file must contain:
- Schematic and PCB
- Libraries files and folder
- others related files
if you compress the whole project will be better.