Is it possible to integrate it on your website work with documents Word, Excel?

There is a task: add the ability to work with MS Office documents (particularly Word and Excel) to your service. You need to give the user the option to upload a document and then edit it already in my website.

Saw a similar integration into Yandex Disk and Cloud however, I can not understand how they did it, because surely they pay some royalties (probably not small) to Microsoft.

In General, advise any solution if not then maybe some pay but with an adequate value. Here is what I would like to see

Thank you!
July 9th 19 at 13:31
1 answer
July 9th 19 at 13:33
It's all free, don't pay.

A lot of implementations in each language(php, python, js, etc.), please specify what, if anything will help you to find the library.

I use NodeJS, please advise for him - Savannah_Kuvalis commented on July 9th 19 at 13:36
: updated the answer. - karina59 commented on July 9th 19 at 13:39

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