Free AI Checker for Google Docs
Check for AI in any
Google Doc — instantly.
The free AI detector for Google Docs. Check if text was written by ChatGPT or another AI, replay the full revision history character by character, and verify authorship in seconds.
Works on any Google Doc you can open
5.0 out of 5 on the Chrome Web Store
Your document is analyzed on-demand and never shared, sold, or used to train any model. Revision data stays in your browser; only the signals needed for each check are sent for analysis.
Features
Everything you need to verify authorship.
Character-level Replay
Watch every keystroke, delete, and paste reconstruct the document — at 1× to 10× speed.
Session Timeline
Jump between writing sessions with a single click. See exactly when each word hit the page.
AI Authorship Check
Paste any text for an AI-generated likelihood score with one-sentence reasoning. Pro runs an AI Content Check on the whole document automatically every time you open a replay.
Typing Pattern Analysis
Delete ratio, keystroke variation, paste volume — surfaced as a single naturalness score.
Video Replay Export
Export the full writing replay as a video to share or archive — every keystroke, paste, and edit exactly as it happened.
Auto-Typer Detection
Automatically flags robotic keystroke timing and suspiciously uniform input rhythms that suggest text was typed by a script, not a human.
How it works
From install to insight in 60 seconds.
Install in one click
Add Checked4AI from the Chrome Web Store in one click.
Open any Google Doc
A toolbar button appears once you're on docs.google.com. Click it to sync revision history.
Watch how it was written
The viewer opens in a new tab and replays the doc character-by-character with a scrubbable timeline.
Understanding Your Results
Checked4AI shows a Natural Typing score from 0% to 100%, based on how the document was actually written — keystrokes, revisions, pastes, and pacing.
A low score isn't proof of AI use. Watch the replay to see exactly how each section was written before drawing conclusions.
Pricing
Start free. Upgrade when you need more.
Install the Chrome extension and get started in minutes.
Free
Per month
- 10 replay views
- 5 pasted-text AI checks
FAQ
Frequently asked questions
How do I check for AI in a Google Doc?
Install the Checked4AI Chrome extension for free, open any Google Doc, and click the toolbar button. It syncs the revision history and lets you replay every keystroke — so you can check for AI generated content by seeing exactly how the document was written.
How does Checked4AI detect AI-generated content?
Checked4AI uses two methods: it analyzes typing patterns from Google Docs revision history (delete ratio, keystroke variation, paste events) and runs the visible text through ChatGPT to estimate the likelihood of AI authorship.
What is the AI Content Check?
The AI Content Check is a Pro feature that runs automatically every time you open a replay. It analyzes the document's text and shows an AI-generated likelihood score with a one-sentence explanation alongside the typing analysis, so you don't have to copy and paste anything.
Is Checked4AI a free AI detector?
Yes. Checked4AI is free to install as a Chrome extension and works on any Google Doc you can open. A Pro subscription unlocks unlimited AI authorship checks, typing pattern analysis, and additional features.
The free AI checker for Google Docs.
Check for AI generated content, detect ChatGPT writing, and replay any Google Doc — character by character.
Add to Chrome