AI Document Detector

Upload a PDF, DOCX or TXT and see which sentences read as AI-written. Free TextSight account: 3 documents a day.

Is this document AI-written? Upload it and find out, sentence by sentence. AI Document Detector checks whole documents for AI-generated writing. Open it from Chrome's toolbar, drop a PDF, Word document or text file into the side panel, and get a 0–100 Humanization Score with every AI-sounding sentence listed. It is built for teachers checking essays, editors reviewing submissions, and writers checking their own drafts before they send them. HOW IT WORKS 1. Click the AI Document Detector icon to open the side panel. 2. Drag a document into the panel, or click to choose one. 3. Read the result: a score, a plain verdict, and the flagged sentences with their own AI percentages. WHAT YOU GET - A 0–100 Humanization Score. Higher means more human. - A plain verdict: Likely AI, Mixed signals, or Likely human. - Every flagged sentence, with its own AI percentage. - The word count of what was scanned. - Your last 10 documents on this device, with their scores. - How many documents you have left today, always on screen. SUPPORTED FILES - PDF, DOCX (Word), TXT and Markdown, up to 10 MB. - Scanned PDFs without a text layer are read with OCR when it is available. - A document needs at least 50 readable words to be scored. - If a document is longer than your plan allows, you can scan its first part instead. PLANS You need a free TextSight account to use AI Document Detector. Sign up takes a minute, and no card is needed. Free: 3 documents a day, up to 1,500 words each. Starter: 25 documents a day, up to 5,000 words each. Pro: 100 documents a day, up to 7,500 words each. Starter is $9.99/month, or $7.49/month billed yearly. Pro is $19.99/month, or $14.99/month billed yearly. Plans include TextSight's other tools on the web. See all plans at textsight.ai/pricing. Payments are handled by Stripe. Scores are detection signals, not proof. Use them to start a conversation or improve a draft, not to accuse anyone. PRIVACY - Only documents you choose are uploaded. The extension does not read web pages, and it has no content scripts. - Your document is sent to TextSight's servers (api.textsight.ai) to extract its text and score it. - Scanned PDFs without a text layer are read with Google Cloud Vision OCR. - The extracted text and its result are saved to your TextSight scan history. - On your device the extension keeps your session, your account's name, email and plan, and your last 10 results (file name, score and word count). Uninstalling removes them. - The extension has no analytics, no ads and no tracking. Full privacy policy: https://www.textsight.ai/extension-privacy.html MADE BY AI Document Detector is made by TextSight (Lacewing Technologies). Web app: textsight.ai. Support: support@textsight.ai.