Claude for Word: what the add-in does and how to install it
In brief
Anthropic's Word add-in puts Claude in a sidebar that reads your whole document, suggests edits as tracked changes you accept or reject, and works without leaving Word. Requires a Team or Enterprise plan.
Contents
Claude for Word is an add-in for Microsoft Word that launched in beta on April 11, 2026. It puts a Claude sidebar inside Word so you can draft, edit, and rewrite document content without switching to a separate tab or copy-pasting between apps.
It completes Anthropic's Microsoft Office suite. Claude for Excel and Claude for PowerPoint launched in February 2026; Word is the third.
What it requires
A Claude Team or Enterprise plan. Free and Pro plans are not included.
How to install it
- Open Microsoft Word
- Go to Insert → Get Add-ins
- Search for "Claude by Anthropic"
- Click Install
- Click the Claude icon in your Home ribbon once installed
- Sign in with your Anthropic credentials
The sidebar loads on the right side of the document and reads the contents of your current file on load.
What it actually does
Document awareness. The add-in reads your entire open document, not just a selected passage. When you ask for a change or feedback, Claude has the full context — headings, paragraphs, tables, all of it.
Tracked changes. When Claude makes edits, they appear as Word's native tracked changes — the same format you see when a human collaborator edits your file. You accept or reject each suggestion individually with one click.
Formatting preservation. Claude's edits keep your document's existing structure: bold, heading levels, alignment. It does not strip formatting to plain text and reinsert.
Chat interface. The sidebar has a conversation panel where you type instructions. You can ask it to rewrite a section, adjust tone across the whole document, add a summary paragraph, or explain why a passage is unclear. It returns suggestions you can apply or discard.
What it's good for
- Getting a working first revision of a dense or wordy section without rewriting from scratch
- Tone adjustments across an entire document ("make this more formal" applies to the full document, not just a selection)
- Structure changes — break a paragraph into bullets, merge two sections, add a transition
- A quick pass before sharing — ask what a reader might find unclear or missing
What to be realistic about
The add-in is in beta. Like Claude's other Office integrations, the feature set will expand.
It works best on document-structured content: reports, proposals, policies, memos. For heavily formatted materials — complex tables, form-heavy documents, mail merges — test your specific workflow before committing to it.
As with all Claude outputs: review before accepting. Claude for Word helps you produce a better first draft faster; it is not a proofreader you can rubber-stamp.
Comparison to using claude.com directly
The functional difference is round-trip friction. Without the add-in: copy text, switch to claude.com, paste, copy result, switch back, paste, reformat. With the add-in: type an instruction in the sidebar, review the tracked changes, accept what you want.
For one-off questions the friction is manageable. For editing-heavy workflows — documents you revise in multiple passes — the add-in is meaningfully faster.
Related: Claude for Google Docs — similar sidebar workflow in Google Workspace. Weekly review with Claude — using Claude for regular document and planning workflows.