Office editor in WP admin

Dear all,

I’m searching a way to use Office editor (in particular Excel) inside my admin area.

I don’t mean to publish / show Excel files to visitors, but to edit my Excel files myself: actually in my child theme I have some excel files which are converted in tables, but to edit / update them I need everytime to delete > edit outside wp > importa again via FTP. I’m just searching a way to do all directly from admin area.

If possible without plugins. Thanks. Mauro