To import html files to notesnook go to Notesnook Importer on your PC/Laptop.
From the list of formats to import, select “Plain Text”.
Drop your html files or click anywhere inside the box to browse and select your html files. Once selected, click on “Start processing”.
Once importer completes processing, download the .zip file.
After you have downloaded the .zip
file, go to Notesnook app > Settings > Notesnook Importer and click on “Import from ZIP file” & select the .zip you downloaded earlier.
Once importing completes you should see all your notes in Notesnook. If you face any issues during importing, report it on github.