A Google Doc is where the real work lands: the proposal, the contract, the 14-page brief nobody has time to re-read. Summarizing one with AI is an obvious win, right up until the summary says something the Doc never did and you have no fast way to tell.
The fix isn't a smarter model. It's a summary where every point links back to the passage it came from, so checking it takes a click instead of a re-read. Here's how to summarize a Google Doc that way.
Why "paste it into ChatGPT" falls short
Copy-pasting a Doc into a general chatbot is the default, and it fails the same three ways every time:
- No source. The summary can't show you which paragraph each point came from, so you either trust it blindly or re-read the whole Doc, which defeats the purpose.
- A stale snapshot. The moment you paste, you fork a copy. Edit the Doc and your summary is describing yesterday's version.
- It drops the parts that didn't fit. Past a certain length you're chunking and pasting, and the model quietly loses the sections that got cut.
The better approach: read the Doc in place, cite every point
Sidenote is a browser extension that connects to Google Docs with read-only access. The required documents.readonly scope reads only the Doc you open, there is no Drive scope at all, and no write access. It summarizes the Doc you have open and puts a citation on every point.
Step 1 - Open the Doc with a read-only reader
Sign in with Google once and grant read-only access. There's nothing for a Workspace admin to deploy org-wide, each person grants their own access, and Sidenote can only read a Doc once you open it. Open the Doc, open the side panel, and it captures a clean, paragraph-anchored snapshot to summarize from.
Step 2 - Ask for a structured summary, not a blurb
Ask for the summary you actually need, not "summarise this":
Summarise this as a list of decisions and who owns each one.
For a contract, ask for the key clauses and the obligations they create. For a brief or PRD, ask for the argument in three points. A summary shaped like the decision you're making is one you can act on.
Step 3 - Spot-check each point through its citation
Every point carries a citation into the Doc. Click it and Sidenote opens that passage in its viewer and highlights it, so you see exactly what the point was built on instead of scrolling fourteen pages of legalese.
Multi-tab Docs summarize cleanly too
Google Docs with tabs used to be a mess for AI: the tabs get concatenated and the boundaries blur. Sidenote captures each tab separately and keeps every tab's title as a heading above that tab's pages, so a summary that spans tabs still cites the right tab and the right page for each point. The pages you see are Google's own typeset PDF, captured through your signed-in session, so columns, tables and text boxes render exactly as they do in the Doc.
Working across a Doc and its spec
Some questions span two Docs: "does this draft match the spec?" Bundle both into a Collection and ask once. Sidenote summarizes across the set and cites which Doc each point came from. The same works for a draft plus its brief, or a contract plus its amendment.
Your Doc content is never used to train AI models and is stored in a UK region isolated per account. See security & compliance for the detail.
The short version
- Don't paste a Google Doc into a chatbot: you lose the source and the live version.
- Use a read-only reader that summarizes the Doc you have open and cites the passage behind every point.
- Ask for a summary shaped like your decision (decisions and owners, key clauses, the argument in three points).
- For multi-tab Docs, each tab stays labelled, so citations land on the right tab and page.