Now with AI authorship detection
See how every Google Doc
was actually written.
Replay the full revision history of any Google Doc as a typing animation. Spot AI-generated content, copy-paste sessions, and authorship patterns at a glance.
Works on any Google Doc you can open · No account required
Features
Everything you need to verify authorship.
Character-level Replay
Watch every keystroke, delete, and paste reconstruct the document — at 0.5× to 16× speed.
Session Timeline
Jump between writing sessions with a single click. See exactly when each idea hit the page.
AI Authorship Check
Paste any text and Claude tells you the likelihood it was AI-generated, with one-sentence reasoning.
Typing Pattern Analysis
Delete ratio, keystroke variation, paste-heavy sessions — surfaced as a single naturalness score.
How it works
From install to insight in 60 seconds.
Install in one click
Add Checked4AI from the Chrome Web Store. No account required to start.
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.
Pricing
One plan. Everything unlocked.
Install the Chrome extension, then subscribe to Pro for unlimited AI authorship checks, replay export, and revision comparison.
Checked4AI Pro
Unlock unlimited AI authorship checks and every Pro feature.
Just $3.33 a month, billed annually
- Replay any Google Doc, character by character
- Unlimited AI authorship checks
- Export replays as video
- Compare any two revisions
- Session timeline + typing pattern stats
- Priority support
Stop guessing how it was written.
Install Checked4AI today and replay any Google Doc — character by character.
Add to Chrome