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AI content detector · ai2human
human <25%mixed 25–40%ai >40%
For educators & professionalsTurnitin-grade · 99.9% accuracy
AI Content Detector& AI Checkerfor student writing.
Paste an essay or upload a document. We map every sentence — not just a flat percentage — so you can read the evidence yourself. Powered by the Turnitin-grade algorithm, available without an institutional license.
99.9%
Turnitin parity
50K-doc benchmark
5K+
Documents scanned
<3s
Average scan time
50+
Languages
how it works
Three signals. One careful read.
Four independent layers run in parallel and combine into one weighted score — the same approach used by Turnitin and GPTZero.
01
perplexity
How surprising is each word?
We score predictability with a language model. Machine writing is unusually easy for a machine to predict — that's the tell.
02
burstiness
Does the rhythm breathe?
Human writing has bursts: a tight sentence, then a sprawling one. Model writing settles into a metronome. We measure the variance.
03
context
Read with you, not for you.
Every sentence is shown with its score and reasoning. You make the judgment. We never auto-fail, auto-report, or grade for you.
why ai2human
Same algorithm. No institution needed.
Turnitin's AI detection is locked behind expensive licenses. AI2Human gives you the same accuracy, accessible to anyone.
99.9% Turnitin parity
In independent benchmarks across 50,000+ documents, our AI probability scores match Turnitin's results within 1 percentage point 99.9% of the time.
Results in under 3 seconds
Four detection layers run in parallel. No waiting, no queue — results arrive instantly. Turnitin can take minutes to return a report.
50+ languages
Perplexity and burstiness signals are language-agnostic. Reliable AI detection in English, Arabic, Spanish, French, German, and 45 more.
Signal-level transparency
Go beyond a single score. See exactly which patterns triggered each flag — Turnitin shows a number, we show you why.
PDF & Word upload
Upload full essays and reports in PDF or DOCX format. Text is extracted automatically — no copy-pasting.
No institutional account
Individual students, educators, and freelancers can run unlimited scans on a Pro or Ultimate subscription from $6/month.
what our users say
40,000+ users. Real results.
“I ran the same essay through Turnitin and AI2Human side by side. The scores were within 2% of each other — and AI2Human was instant.”
Amina K.
PhD student, University of Edinburgh
“We use this to QC AI drafts before publishing. The signal breakdown tells us exactly which sentences to rewrite — Turnitin doesn't give you that.”
Leo M.
Content Director, SaaS startup
“Finally a detector that doesn't flag my students' naturally varied writing as AI. The false positive rate is much lower than GPTZero.”
Priya R.
High school English teacher
who uses it
From students to publishers.
Students
Self-check essays before submission to ensure they won't trigger institutional Turnitin flags.
Learn more →Educators
Quickly verify student submissions without a costly Turnitin institutional license.
Content creators
QC AI-drafted content before publishing to maintain authenticity and brand voice.
Learn more →HR & Publishers
Verify freelancer submissions and ensure hired writing is original human work.
faqs
Common questions.
About our Turnitin-alternative AI detection tool and how it compares.
related tools
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Need to bypass AI detectors? Start with our AI Humanizer — it uses the inverse of our detection algorithm to make AI text undetectable.
Compare AI2Human with alternatives: vs QuillBot, vs Undetectable.ai, vs HIX Bypass.
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