Anthropic just launched Claude as a Microsoft Word add-in. You highlight text, describe a change, and Claude edits your document using tracked changes. Here is how to set it up and what to use it for.
What You'll Need
A Claude account (as of writing Team, or Enterprise plans)
Microsoft Word (desktop or web)
The Claude for Word add-in from the Microsoft Office Marketplace
Note: works best with Word for Microsoft 365
Step 1: Install the Add-In
Go to the Microsoft Marketplace here and click “Get it now” to install.
Alternatively you can open Word and go to the Insert tab. Click "Get Add-ins" and search for "Claude." Install the official Anthropic add-in.
Once installed, you will see a Claude panel on the right side of your document. Sign in with your Claude account.
Step 2: Edit Text With Tracked Changes
Select any text in your document, then describe the change you want in the Claude panel. Claude rewrites the selection and presents it as a tracked change you can accept or reject.
Try this:
Rewrite this paragraph to be more concise and direct. Keep the same meaning but cut the word count in half.Make this section sound more professional. It's going to a client.Simplify this paragraph so someone without a legal background can understand it.Your original formatting stays intact. You review the changes the same way you would review edits from a colleague.
Step 3: Use Comments to Request Changes
Instead of selecting text, you can leave a comment on any section of your document. Claude reads the comment and responds with an edit suggestion anchored to that exact passage.
Try these prompts:
This intro is too long. Tighten it to three sentences.Add a transition sentence between this paragraph and the next one.This sounds too informal for a board report. Adjust the tone.Customisation: be specific about the audience or purpose. Claude adjusts its edits based on the context you give it.
Step 4: Check Your Document for Errors
Claude can scan your entire document for issues that are easy to miss in a manual review.
Try this:
Check this document for inconsistent terminology. Flag anywhere I switch between different terms for the same thing.Find any broken cross-references or numbering errors in this report.Review this proposal for spelling, grammar, and punctuation. Suggest corrections as tracked changes.This is especially useful for long documents, multi-author reports, or anything that has gone through several rounds of edits.
Step 5: Draft New Sections From a Description
If you need to add content to an existing document, Claude can draft new sections that match the style and structure of what is already there.
Try this:
Add an executive summary at the top of this report. Base it on the content in the rest of the document.Write a conclusion section that summarises the three main recommendations in this proposal.Draft a one-paragraph project overview based on the scope section below.Note: Claude reads the full document for context, so the new content should match the tone and terminology you have already used.
Real-World Applications
Contracts and Legal Documents
Review contracts for inconsistent terms, flag ambiguous clauses, and rewrite sections in plain language. Useful for first-pass reviews before sending to legal.
Reports and Proposals
Tighten executive summaries, fix formatting issues, and improve readability across long documents. Ask Claude to check for consistency when multiple people have contributed sections.
Marketing and Communications
Adjust tone for different audiences, rewrite copy for clarity, and ensure brand terminology is used consistently. Helpful for press releases, case studies, and client-facing materials.
Internal Documentation
Clean up process documents, onboarding guides, and policy manuals. Claude can standardise language and flag sections that need updating.
Next Steps
Start with a document you are already working on. Select a paragraph that needs improvement, describe the change, and review what Claude suggests.
Start with these prompts:
Read this document and suggest three things I could improve for clarity and readability.Rewrite the introduction to be more engaging. This is for a client presentation.Check this entire document for grammar, spelling, and consistency issues. Show me what you find as tracked changes.