If you draft in Claude, paste into Word, edit, then go back to Claude, the add-in removes that round trip.
Claude for Word puts Claude in a sidebar inside Word, where it answers questions about your document, edits the passages you select and can make every change as a tracked revision. It is generally available on the Pro, Max, Team and Enterprise plans.
What Claude can do in Word

- Answer questions with citations. Ask about a section, clause or defined term, then click the citation to jump to it.
- Edit a selection. Claude rewrites only the passage you select and keeps the surrounding styles, numbering and formatting.
- Tracked changes mode. Every edit lands as a revision you accept or reject in Word's review pane.
- Work through comments. Claude edits the text each comment points to and replies in the thread with what it changed.
- Summarize redlines. When a document comes back with someone else's tracked changes, Claude summarizes them and flags the ones worth discussing.
- Fill templates. New sections take on your document's heading and paragraph styles.
How to install Claude for Word
For yourself: open Microsoft Marketplace, search for Claude by Anthropic and select Get it now. You can also open Word, go to Home, then Add-ins, and search for Claude. Then sign in with your Claude account.

In an organization: your IT team deploys the add-in from the Microsoft 365 Admin Center and assigns it to you. Anthropic lists it there as Claude for Microsoft 365. Once it is installed, Claude appears on the ribbon.
What your plan includes
- Claude plans: Pro, Max, Team and Enterprise. Usage counts toward your normal Claude limits.
- Word versions: Word on the web, Word for Windows with a Microsoft 365 subscription (version 2205 or later) and Word for Mac (version 16.61 or later).
- Not supported: Word 2016 and 2019, the iPad and Android apps, and legacy .doc files, which you need to save as .docx first.
- In an organization: access also depends on your admin settings and on whether Office Store add-ins are allowed.
When Claude for Word earns its place
There are four situations where Claude for Word pays off quickly:
- Contract or policy review, where every change has to be visible as a tracked revision.
- A document full of reviewer comments that need working through.
- A draft that came back with redlines from a client, partner or counterparty.
- A one-pager or memo built from a report, in your own template's styles.
How to draft and refine a document, step by step

Step 1: Open Claude and set your instructions. Select Claude on the ribbon to open the sidebar. In Settings, use the Instructions field for preferences that apply to every conversation in Word, such as your tone or citation style.
Step 2: Turn on tracked changes mode. Every edit then arrives as a revision you can review, instead of changing your text directly.
Step 3: Ask for the draft. Write the request with our CODO framework: who Claude should be (Character), what you need (Objective), what to do and avoid (Do and Don't), and what to hand back (Output). Open the source report in Word or attach it. A template is below.
Step 4: Check before you edit. Cross-reference two or three claims against the source, and check that the terminology really comes from it. This habit is what makes the output defensible.
Step 5: Refine one passage at a time. Select a paragraph that feels too broad and ask, for example, “Make this more concrete and decision-focused for a senior leadership audience.” Claude rewrites only that passage.
Step 6: Do a final pass. Select the whole document and ask, for example, “Shorten the whole piece by 20% and make the tone more decisive.” Review every tracked change before you accept it.
Claude for Word also shares context with Claude for Excel, PowerPoint and Outlook, so one conversation can span your document, workbook, deck and inbox.
A CODO prompt to start with
Open the source report in Word, or attach it, and paste this into the Claude sidebar.
Character: You are a senior editor who turns research into decision-ready one-pagers for a leadership team. Objective: Turn this report into a one-pager that helps my leadership team decide [decision]. Do: - Use the report and [reference file] as the only sources of facts and terminology. - Open with an executive summary of the decision and your recommendation. - Explain what the three most important insights mean for us. - Use this document's heading and paragraph styles. - End with recommended next steps. Don't: - Don't add facts or figures that are not in the sources. Flag gaps as questions. - Don't use generic AI phrasing. Output: One page with the headings Executive summary, Positioning implications and Recommended next steps.
Want a ready-made starting point? These how-to articles show practical ways to use Claude in your documents:
- Work with Claude across Microsoft 365 apps: one conversation that moves between Word, Excel and PowerPoint.
- Build SOPs for any workflow: turn process knowledge into procedures your team can follow.
- Draft a personal introduction that positions you strategically: an introduction for a new role, board or audience.
What will your IT and legal teams ask?
- What can Claude see? Only the document you have open, including its text, comments, tracked changes, footnotes and tables, plus any files you attach.
- Where is the data kept? Conversations go to Anthropic, which deletes inputs and outputs within 30 days, with some exceptions. Chat history is also stored locally in your browser, and you can clear it in Settings.
- Does it follow our retention and audit settings? Not fully. It does not inherit custom data retention settings, and its activity does not appear in Enterprise audit logs. Enterprise organizations that use the Compliance API do get Claude for Word sessions there.
- What about hidden instructions? Anthropic warns that documents from outside sources can hide instructions in text, comments, tracked changes, headers or footers. Use it with trusted documents, and read any confirmation request carefully.
- Are there known issues? After the September and October 2026 Microsoft 365 updates on Windows, some users lost their chat history and uploaded skills in the add-in. Anthropic is working with Microsoft on a fix.
Claude for Word or another AI tool?
Claude for Word is strongest when every change has to be visible and reviewable, such as contracts, policies and documents with many reviewers.
Copilot in Word drafts from the files, emails and meetings already in your Microsoft 365. If your company runs on Google Workspace, Gemini in Google Docs is the equivalent. Our comparison of AI writing tools for senior leaders covers all four, and our guide to Claude for PowerPoint shows the same add-in in your slides.
Key takeaways
- Install it from Microsoft Marketplace, or ask IT to deploy Claude for Microsoft 365.
- Set your Instructions once, so every conversation in Word follows your tone.
- Use tracked changes mode for anything other people will review.
- Check two or three claims against the source before you start refining.
- Only use it with documents you trust, and review every change before you accept it.

