How to edit Office documents online?

Question

API

The task arrived to organize editing of office documents in the browser.
But you need to do this from your web application . It is clear that writing your Google Docs from scratch is not an option.
Are there any services like GD that allow you to embed an office document editor in your web application, and also have a clear API so that the application can interact with editing (for example, log a history of changes).
Interested in both free options and paid ones.

Answer 1

https://www.onlyoffice.com/ru/
https://www.onlyoffice.com/ru/developer-edition.aspx
https://api.onlyoffice.com/editors/basic
Another option
https://myoffice .ru/products/sdk/

Answer 2

In fact, office documents are a Zip archive with only a changed extension, at least it was like that before 365, don’t believe it, try to make sure, create a word document, rename the extension name to * .zip and open it with a regular archiver, you will see a lot of interesting things in it seems like normal XML
On the other hand, try using https://office.live.com/start/Word.aspx?ui=en-RU instead of GD, this is of course not your application, but it also allows you to do this

Answer 3

Even the Microsoft web applications themselves can’t open any complicated documents created in Office normally, only somehow. But if it suits you, then https://docs.microsoft.com/en-us/previous-versions...

Answer 4

OnlyOffice - they said about it...
Collabora - It didn't happen)))
There are instructions on how to integrate with Nextcloud.
MSOffice - it was mentioned .... but it would be necessary to add a sharepoint server - an expensive but good thing.