Can Google Docs Detect AI Writing?
Updated
No. Google Docs™ doesn’t include a built-in AI detector, so it won’t tell you whether text was written by a person or generated by AI. What Docs does have is version history, which shows how a document was written over time. To actually check the text for AI writing, you can add an AI-detection add-on such as Plagiarism Checker Plus.
What Google Docs can show you: version history
Version history is the closest thing Docs has to a writing record. In a document, open File › Version history › See version history. The panel lists saved versions over time and who made the edits, and you can open an earlier version to see what changed.
Some people use this as context: a document typed over several sessions looks different from one where large, polished blocks of text appear all at once. But version history shows how text arrived, not who or what wrote it. Pasting from your own notes, another editor or an offline draft is completely normal, and you need edit access to the document to see its history.
How to add an AI check to Google Docs
Check a Google Doc for AI writing with an add-on
- Install Plagiarism Checker Plus for Google Docs from Extensions › Add-ons › Get add-ons.
- Open your document and choose Extensions › Plagiarism Checker Plus › Check this document.
- Sign in (a free account is required), tick AI-generated text, and click Check document.
- Read the AI score and the flagged passages; tick Highlight AI sentences in document to see them in the doc.
The full walkthrough is in How to check a Google Doc for AI writing.
What AI detectors can and can’t tell you
AI detectors look for statistical patterns that are common in machine-generated text. That makes them useful for spotting passages worth a closer look, but not for proving anything:
- No detector is perfect. Human writing can be flagged — especially formal, formulaic or non-native English writing — and AI text that has been edited can be missed.
- Scores are estimates. A 60% AI score isn’t a verdict that 60% of the document was generated; read it alongside the flagged passages. See How to read your plagiarism and AI scores.
- Short text is hard to judge. Checks need at least 50 words, and very short sentences aren’t scored on their own.
If you’re a teacher
Use an AI score to start a conversation, not to end one. Combine it with what you know about the student’s writing, earlier drafts, version history and, where possible, a short discussion of the work. Check your institution’s policy on AI tools and on how detector results may be used.