AI Detector for Microsoft Word users, students, professionals, and teams.

Route 1: drop your .docx directly onto TextSight

Save your Word document, then drag the .docx onto app.textsight.ai or click Upload. TextSight supports .docx natively through the file extract endpoint, parses paragraphs and Word heading styles out of the Word XML package, and returns sentence-level scores in about five to fifteen seconds for a 2,000-word brief. Paragraph breaks, heading hierarchy, bulleted and numbered lists, footnotes, and endnotes all carry through cleanly. File upload starts at Pro at 19.99 dollars a month (14.99 on yearly).

Route 2: paste from Word into the free web app

Open your Word document, press Ctrl+A then Ctrl+C (Cmd+A then Cmd+C on Mac), open app.textsight.ai in another tab, paste, hit Scan. Results stream back in three to six seconds for a 1,500-word draft. Paragraph breaks survive the paste; heading styles flatten to plain text but are still scored as separate blocks. Works on the free tier with three scans a day, no signup needed for the first scan. Good for memos, single-section reviews, and anything under about 5,000 characters.

Then: fix the red sentences in Word, re-scan

Toggle back to Word, rewrite the flagged sentences in place using Track Changes if you want the diff visible to a reviewer, then re-upload or re-paste for a second scan. Most pieces go from red to green in two or three iteration cycles. If a sentence flags on every pass, run it through the integrated AI rewriter (Light, Balanced, or Maximum) and drop the rewritten line back into the Word document. The annotated .docx export on Pro returns a copy of your file with sentence-level highlights inserted as Word comments for downstream review.

Copilot generates, TextSight audits

The Draft With and Rewrite buttons in the Word ribbon and the Copilot for Microsoft 365 task pane are drafting assistants. They produce paragraphs, expand bullets into prose, and rewrite for tone or length. Neither surfaces a number for how AI-shaped the output reads. TextSight is the inverse: it does not generate text, it scores text. The realistic 2026 workflow uses both, with Copilot on the drafting side and TextSight on the pre-publish side.

Copilot output is calibrated as a flagged model

The detector is trained on outputs from Copilot Draft With, Copilot Rewrite, and the Editor Copilot suggestions that appear inline in Word, alongside raw GPT-4o, Claude, and Gemini drafts. Word documents containing a Copilot-generated section flag at the same fidelity as any other model. Sentence-level highlights point at the specific lines so the writer can rewrite the Copilot residue without guessing.

Track Changes does not address AI

Some writers think wrapping a Copilot paragraph in tracked insertions or reviewer comments will change the score. It does not. TextSight reads the final accepted body of the document, the same view a reader sees when markup is hidden. To audit the original draft, accept or reject all changes first or scan a separate copy. The score reflects what the next reader will read, which is the right target to optimise.

The planned Office Add-in will dock a task pane inside Word, score the active document on demand, and render flagged sentences using the native Word comments and Track Changes surfaces so the writer can accept or reject AI rewriter rewrites inline. The underlying scan and the Authenticity Score model are identical to the web app. The Office Add-in submission process for the Microsoft AppSource store takes around six to eight weeks of validation after the technical build is ready.

Until that ships, the .docx upload flow is faster than you might expect. Drop a 2,000-word brief onto app.textsight.ai and the scan returns in five to fifteen seconds. Heading hierarchy, paragraph breaks, footnotes, and endnotes all carry through. Long documents above 50,000 characters work cleanly on Business, which raises the per-scan ceiling.

If a native add-in would meaningfully change your workflow (for example because a corporate IT policy blocks file upload to third-party SaaS and you need an in-Word task pane to clear procurement), tell us on the contact page. Demand signal directly affects roadmap priority. Excel and PowerPoint support is also tracked there.