AI Detector
Check whether text looks human, AI-generated, or mixed
Free AI Detector
The free AI Detector that shows you the evidence
Check whether writing is human, AI-generated, or somewhere in between - with sentence-level evidence, in seconds, in your browser.
No signup to try
Sentence-level evidence
Latest AI models
Browser extension
Scan for AI right where you read
Add the Word Spinner extension and check text for AI signals the moment you see it - inside Google Docs, email, your LMS, and any web page.
Clear signal
See how likely your text is AI
Run any draft through the AI Detector for an at-a-glance human / mixed / AI-generated split you can actually explain - a signal, never a verdict.
Sentence-level
Evidence, not just one vague number
Every sentence is scored and highlighted, so you can see exactly where AI-generated phrasing appears and read the reasoning behind each flag.
Multilingual
Detect AI text in 30+ languages
From English and Dutch to Spanish, French, and German, scan drafts for AI signals in the language your writing is actually in.
Responsible AI
Detection is a signal, not a verdict
Word Spinner flags text that may be AI-generated and shows you the evidence behind every result. AI detection is probabilistic, so never rely on it alone to make decisions that affect someone’s career or academic standing.
How to detect AI text in 3 steps
Paste or upload text
Drop in an essay, article, or draft - or scan a page with the extension.
Run the scan
Press Detect and get an overall AI likelihood in just a few seconds.
Review the evidence
Read the highlighted sentences and each flag’s reasoning, then decide with full context.
| Word Spinner | Basic AI detectors |
| Sentence-level highlighted evidence | One overall number only |
| Human / Mixed / AI split you can explain | A binary AI-or-not guess |
| Tuned for the newest AI models | Outdated on today’s tools |
| 30+ languages supported | English-only checks |
| Scans inside your browser | Copy-paste only |
How can the AI Detector help you?
Teachers
Review student work for AI signals with clear, explainable evidence you can point to.
Editors & content teams
QA drafts and freelance submissions before anything goes live.
Students
Check your own writing for AI-sounding phrasing before you submit.
Why teams trust the AI Detector
Finally, real evidence
The sentence highlights let me show exactly what got flagged and why.
Verified user
Fast and clear
One scan and I know which drafts need a closer human look.
Verified user
Part of our QA now
We run every submission through it before anything is published.
Verified user
Browser extension
Detect AI anywhere with the Word Spinner extension
Scan text for AI signals without leaving the page - inside Google Docs, your LMS, email, LinkedIn, and any web page.
Also on Edge · Firefox · Safari
Detect
AI Detector FAQs
Is the AI Detector free?
Yes. Sign up free for higher limits and saved scan history.
How accurate is it?
It gives a strong probabilistic signal across today’s AI models, but no detector is 100% accurate. Always use your own judgment.
What do the categories mean?
Every sentence is labelled human-written, mixed, or AI-generated, with an overall likelihood for the whole text.
Which languages are supported?
English, Dutch, Spanish, French, German, Portuguese, and 25+ more.
Should I rely on it alone?
No. Treat the result as one signal, never the only basis for academic, hiring, or professional decisions.
The all-in-one AI writing toolkit. Humanize, detect, rewrite, check, summarize, and translate. Free to start.
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