Sérgio Santos

Registers an oEmbed handler for Google Docs and adds it to the whitelist, allowing all users who can write posts/pages to embed documents, spreadsheets and presentations.
<h4>Usage</h4>
To embed a Google Doc into a post or page: 
1. Open the document on Google Drive 
2. Select the Publish to the Web under the File menu 
3. Then copy the link and paste it into the content area. Make sure the URL is on its own line and not hyperlinked (clickable when viewing the post)
For example: 
 https://docs.google.com/document/d/abcdefghij/pub
Another option is to wrap the URL in the [embed] shortcode: 
 [embed width=”860″ height=”640″]https://docs.google.com/document/d/abcdefghij/pub[/embed]

Google Docs oEmbed

Embed Google documents, spreadsheets and presentations in your posts or pages.

WordPress.org

Ella

This plugin allows you to create documents with WordPress, and to share them with others so they can also read and edit. Share the unique link to let anyone edit, or restrict access to specific email addresses.
With the Gutenberg plugin, Docs supports real-time collaborative editing — multiple users can edit the same document simultaneously, seeing each other’s cursors and changes live.
<h3>Sharing</h3>
The share panel (in the document sidebar) lets you control access:
<ul>
<li>Anyone with the link — anonymous users get a randomly generated animal name and emoji avatar (e.g. “Anonymous Fox”). They can edit text but cannot upload files.</li>
<li>Specific people — invite collaborators by email. They receive a magic link to access the editor. Email-invited users can upload files.</li>
<li>Existing users — add collaborators from the user autocomplete. They get full editing and upload access.</li>
<li>Restricted — only the document author and invited people can access.</li>
</ul>
<h3>How it works</h3>
Documents live entirely in wp-admin — there’s no public frontend. Each doc gets a unique and secret shareable URL that opens the editor directly.
Anonymous visitors don’t create any database entries. Their identity exists only in a browser cookie and disappears when it expires.
Email-invited people are created as real WordPress users (without a role) so their edits show up in revision history. They log in via magic links sent to their email.

Docs

how it works? 
Can I use it in the classic editor?

how it works

Create and share documents with WordPress!

Google Docs oEmbed vs Docs