AI humanizer for Microsoft Word: one documented integration, paste for the rest

Grammarly's page for Microsoft Office says Grammarly "works across both Windows and Mac in Word, Outlook, PowerPoint, and Teams", that it works in Excel on Windows but not on Mac, and that the free version of the desktop app can be used "for as long as you'd like" (Grammarly, Grammarly for Microsoft Office, read 9 November 2026). The page sells proofreading, full-sentence rewrites and tone; it does not use the word humanizer.

The humanizer is a feature of the Grammarly account. Grammarly's humanizer page describes a Humanizer agent with four preset styles, a custom voice built from a pasted writing sample, and six languages, English, Spanish, French, German, Portuguese and Italian, and asks users to "follow the appropriate guidelines for acknowledging AI use in your work" (Grammarly, AI Humanizer, read 9 November 2026). Grammarly's plans page prices AI prompts per month, not humanizer words, which is why no word figure appears on this page; the detail is in the Grammarly humanizer review.

The fourth row is worth a sentence. Word Online is a web page, and QuillBot's Chrome extension says it works in any text field across the web, read 9 November 2026, so the browser version of Word is reachable by the same extensions covered on the Chrome extension page. No vendor listing names Word Online, so treat it as untested until you try it.

The install is free in every case; the allowance belongs to the web account. Figures are from the vendor pages checked on 8 November 2026 unless dated otherwise.

A 2,500-word report goes through Clever AI Humanizer in one request at no cost, through Phrasly's paid plan in one, through HIX Bypass in one, and through Walter Writes AI's Starter in four passes of 750 words, all per the caps checked on 8 November 2026. Grammarly's prompt count does not map to words, so the honest answer for Grammarly is that the page does not say.

It can, in two places, and both are worth knowing before a paste. Microsoft's support page says version history "only works for files stored in OneDrive or SharePoint in Microsoft 365", that you open it from the file title or File > History, and that it lets you "see what changes have been made in a file, compare different versions, or restore the version you want" (Microsoft Support, view previous versions of Office files, read 9 November 2026). A document saved only to a local disk has no such history.

Track Changes is the second record. Microsoft's page says that when it is on, "deletions are marked with a strikethrough, and additions are marked with an underline", that different authors' changes show in different colours, and that a document shared for review may not let you turn tracking off (Microsoft Support, track changes in Word, read 9 November 2026). Paste a humanized paragraph over the original with tracking on and the reviewer sees the whole old paragraph struck through and the whole new one underlined, in your colour.

No. A desktop app, a browser extension and a paste all send the same words to the same model, so meaning kept and errors introduced belong to the tool. What the route changes is the shape of your check. A paste gives you two windows side by side, the original and the rewrite, which is where a dropped qualifier or a changed number is easiest to catch. An in-place rewrite replaces the paragraph where it stands, and the original survives only if version history or Track Changes was on.

The published method on this site weights meaning kept at 35 of 100 points and errors added at 20, rated by two editors on the web tool's output, against 30 for readings on five named detectors and 15 for limits and access. The route into Word is a convenience; the tool is the decision.

No detector score should be the only evidence in a misconduct case, and neither is a tracked change; it is a record of what the document said before and after, kept by Word for whoever opens it.