Do you store the Standard Notes ZIP during conversion?

[ObiSandwich]

Hi... really loving Notesnook and I'm ready to migrate my notes from Standard Notes. All makes sense following the instructions from here: https://help.notesnook.com/importing-notes/import-notes-from-standardnotes

But - when I use your import converting tool from here: https://importer.notesnook.com

...there's no mention of what happens to the Standard Notes ZIP file during and after conversion (also no info about this on the above guide page) - ie. Can you access and read the contents of the ZIP? Do you store the ZIP or the contents during and after a conversion?

To help my privacy concerns - Is there a way I can manually convert the ZIP locally? What is your converting tool doing?

Thanks,