Help in opening and editing an excel workbook from a web-browser

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Hi!
I am not sure if this can be done with flask.

I have an excel template and a web-page. What i want is to be able to open a copy of the template with a button click from the browser, be able to edit this copy and save it.

It would be great if I could open, view and edit this copy within the browser, but even if it happens outside of the browser, I should be able to work with it.

Could anyone please tell me where I should look to get info on such a thing? Cursory googling was not helpful.

Thanks!