AI Text Detector
Select any text and see how likely it is that a language model wrote it.
Select a passage on any page, open the popup, and you get a reading plus the sentences that look machine written. Everything runs inside your browser: nothing is uploaded, no account, no history kept.
How it works
- Select a passage on a page, or paste it into the popup.
- Press Check and the analysis runs locally in your browser.
- Read the verdict, the sentence heat map and the four signals behind it.
What you get
- Perplexity — how predictable every next word is
- Burstiness — how much sentence length and rhythm vary
- Repeated connectors, hedges and template openings
- Vocabulary spread and how much a passage restates itself
- Word and sentence counts you can copy into a report
Screenshots
Questions
- Is my text uploaded anywhere?
- No. The analysis runs entirely in the browser, so confidential drafts stay on your machine.
- Is a high score proof of AI writing?
- No. The report is a signal, not a verdict — treat it as one input alongside your own reading.
- Which texts does it handle best?
- Essays, articles and cover letters — passages long enough for rhythm and vocabulary to be measurable.
Install it
Free, no account, works right after install.
Add to Chrome — free