Online office on the site?

Question

Automation

1. Are there libraries that allow you to deploy an online office on your site?
You only need to view documents without editing.
If so, please share links and examples.

Answer 1

PHP Excel -> Everything for working with Excel spreadsheets and PDF,
Examples are inside the turnip.

Answer 2

https://owncloud.org/
https://nextcloud.com/

Answer 3

1) libreoffice can work online.
2) onlyoffice will sharpen exactly for this

Answer 4

You only need to view the documents

Modern browsers handle this without problems, open the word file in the browser and see.
So you only need to implement a file manager, and there are a lot of ready-made ones.