What is an AI content detector?
It reads your writing and determines whether a person or a language model produced it. AI prose carries a statistical fingerprint: metronomic sentence lengths, a narrow vocabulary band, an avoidance of contractions. Human writing is more irregular by nature, and detectors exploit that contrast.
How it works
Step 1
Paste and analyse
Drop your text in and click Analyse. Seven statistical checks run instantly in your browser, then feed into a server-side model for a combined verdict.
Step 2
Read the report
One unified report: overall verdict, detailed reasoning, sentence-level colour coding, and every statistical indicator that contributed to the result.
Step 3
Download or share
Copy the report as markdown or download a clean PDF. Handy when you need to send evidence to someone else.
Supported models
Detection is structural, not version-specific. It catches the latest versions of every major model, and new ones built on the same architecture.
.... and every other model built on the same transformer architecture. If it writes like a language model, we catch it.
Features
Dual-layer detection
Heuristic analysis runs in your browser, then a state-of-the-art LLM cross-validates with deep reasoning. Two independent systems, one verdict.
Sentence-level highlighting
Every sentence classified individually with its own confidence score. Hover to see the verdict.
100+ languages
Paste text in any language, no configuration needed. Statistical heuristics are language-agnostic by nature.
Zero data storage
All heuristics run client-side. We don't store your text, don't build databases, don't train on your content.
See all features12 more across detection, reporting, and privacy
Detection Engine
Uniformity, burstiness, vocabulary diversity, n-gram repetition, and more.
Works on all transformer-based models, including ones that don't exist yet.
Swapping words doesn't fool rhythm and density analysis.
Stats run in milliseconds, before the server round-trip.
Analysis & Reporting
Why it flagged each passage, citing specific structural tells.
No contractions, uniform length, triple-list pattern, and others.
One-click download with verdict, reasoning, and highlights.
Copy your full report as formatted markdown.
Privacy & Transparency
No sign-up, no email. Paste and go.
Scan count lives in localStorage. That's it.
We publish what we check and how we weight it.
Part human, part AI? We say so. No forced binary.
Who uses AI content detectors?
Students
Check your work before submission. Better to know now if something reads as AI-generated.
Educators
Sentence-level evidence you can point to. Useful in a conversation where vague accusations won't do.
Writers
Identify which passages trigger false positives so you can revise before an editor raises the question.
Publishers
Screen freelance and guest submissions. A quicker first pass than a manual read.
How we compare
| Feature | tryai.tools | ZeroGPT | GPTZero |
|---|---|---|---|
| Sentence highlighting | Yes | Partial | Yes |
| Reasoning | Detailed | No | Basic |
| Detection method | 7 heuristics + AI | AI only | AI only |
| Free daily scans | 5 | Unlimited | 3 |
| Downloadable PDF | Yes | No | No |
| Sign-up needed | No | No | Yes (full) |
| Multilingual | 100+ languages | English only | Limited |
| Data storage | None | Unclear | Yes |
| Statistical indicators | 7 metrics | No | Perplexity only |
| Explainability | Full reasoning + patterns | No | Basic |
Frequently asked questions
How accurate is this AI detector?
85-95% on unedited AI output. Blended text (human-edited ChatGPT drafts, for instance) is harder. That's why we show sentence-level results instead of a single score.
Which AI models can it detect?
ChatGPT, Claude, Gemini, DeepSeek, Llama, Mistral, Copilot, Perplexity, Cohere, Grok, and any other model built on the same transformer architecture. Detection is structural, not version-specific.
Will Google penalise AI-generated content?
Google's position is that AI content isn't against their guidelines. Thin, unoriginal content is. A detector flags the mechanical patterns that make text look mass-produced, which is what search engines actually care about.
How does the detection work?
Seven statistical checks run instantly in your browser, then those scores get sent alongside your text to a server-side model. It reads each sentence, factors in the heuristic data, and produces a single unified report with sentence-level classifications and detailed reasoning.
Can AI detectors be wrong?
Yes. Academic prose and non-native English trip false positives more often than they should. This is an industry-wide problem, and it's the main reason we show the evidence instead of hiding it behind a percentage.
Is this free?
Five scans per day, no account needed. Each scan gives you the full report with sentence-level analysis, reasoning, and statistical indicators.
Can I download the report?
Yes. After any scan you can download a PDF or copy the results as formatted markdown. The PDF is always in light mode for readability, regardless of your theme setting.
What's the minimum text length?
50 words. Below that there isn't enough material for a meaningful statistical analysis. Aim for 100+ words where possible.
How does this compare to Turnitin?
Turnitin's AI detection requires an institutional subscription. We offer comparable sentence-level analysis for free, with published reasoning for each classification.