AI Detector: Check If Your Text Is AI-Generated
Check a draft for AI-like patterns, including text generated with ChatGPT. Humanizer AI returns an indicator for review, not proof of authorship or a prediction of another detector’s result.
How to read your AI checker result
An overall score is a combined indicator, not a calibrated probability that an author used AI. It is not the percentage of copied text or an institutional Turnitin score.
One observed short-text check: “The library opens on Monday. Bring your card to borrow a book. Staff can help you find the reading room.” This assistant-written, 20-word sample returned 78 with “Likely AI” in our development build on September 8, 2026. At this length only the statistical rules run. One sample cannot measure accuracy, and the number does not mean 78% of the words were generated.
Free checks accept up to 1,000 words. Signed-in free accounts have three checks. Longer documents and rewriting require a subscription. Text is sent to our server for processing; do not assume the check is offline or that this page promises zero retention.
How Our AI Writing Detector Analyzes Your Text
Perplexity Analysis
When available, a language model estimates text predictability. Predictable writing can be human-written; this signal alone cannot establish authorship.
Burstiness Detection
Sentence-length variation is one statistical signal. Both human and generated writing can have regular or varied sentence rhythms.
Readability Scoring
Readability describes how difficult text is to read. It can help you review a draft, but does not prove that AI wrote it.
Writing Pattern Analysis
Repeated phrases and other statistical patterns contribute to the assessment. Common transitions and formal language are not evidence of misconduct.
Who Uses Our AI Content Detector?
Students & Academics
Review your draft alongside your sources and version history. Follow your institution’s AI policy; this score cannot predict Turnitin.
Content Writers & Bloggers
Use flagged passages as a prompt to review clarity and specificity. A detector score does not measure factual quality or search ranking potential.
Educators & Institutions
Use the result to start a conversation about writing. Examine drafts and sources before making any judgment about authorship.
How AI Detection Works in Detail
Understanding detection mechanisms helps you better interpret results from our AI checker and improve your writing.
Perplexity and Text Predictability
The website combines statistical rules with optional language-model and classifier signals when those models are available. The combination can change if a model is unavailable. See our methodology for the current implementation and limitations.
Burstiness and Sentence Rhythm
The distribution of sentence lengths describes writing rhythm. Regular rhythm occurs in human writing too. Editing a sentence to change its score does not establish who wrote it.
AI Detection Limitations: What You Should Know
We do not publish a validated accuracy percentage for this combined website detector. Short, technical, edited and multilingual text can be misclassified. False positives and false negatives are possible; retain drafts and assess the writing itself.
Prepare Your Text Before Turnitin
Humanizer AI is independent of Turnitin. Our result is not an institutional AI Writing Report.
Analyze your text
Paste your essay or paper into our AI detector. You'll get an overall score and sentence-by-sentence highlighting identifying passages detected as AI.
Identify flagged passages
Inspect highlighted passages for clarity and evidence. Turnitin may assess the same passages differently.
Review and document your work
Check sources and keep draft history. If you rewrite, verify that meaning and citations remain correct; no rewrite guarantees a passing score.
Detecting Mistral and French AI Models
You can submit text created with Mistral or another writing model. This checker does not identify which model generated a passage.
An interface translation is not evidence of detector accuracy in that language. We have not established equivalent performance across languages; consult the methodology before relying on a result.
AI Detector for SEO and Content Marketing
A detector score is not an SEO audit. Review factual accuracy, original value and usefulness to readers before publishing.
Use detection as an optional editing signal. Neither a low score nor a humanized rewrite guarantees indexing, rankings or traffic.
AI Detector FAQ
What is an AI detector and how does it work?
An AI detector estimates whether text has patterns associated with generated writing. Humanizer AI combines statistical and optional model signals. It can misclassify both human and AI text.
How accurate is this free AI detector?
We have not established a validated accuracy percentage for the combined website detector. Performance can vary with language, length, editing and model availability. The score is an indicator, not proof.
How does the AI detector work?
Paste text into the checker. The website returns an overall indicator and sentence-level analysis. The methodology explains which signals are used and how they differ from our public API.
Can I detect AI text from ChatGPT and Claude?
You can check a ChatGPT or Claude draft, but the result cannot reliably identify its source model or certify its authorship.
What should I do if my text is detected as AI?
Review the writing and supporting evidence. Keep source notes and version history. Do not rewrite correct human text solely to satisfy a detector.
How is this different from GPTZero?
Humanizer AI combines a detector and a paid rewriting workflow. Scores from different products are not interchangeable; we do not claim equal accuracy to GPTZero.
Does the AI detector work with Mistral and other models?
You can submit a Mistral draft. We have not validated detection across every model, version or language.
How do I humanize text that's detected as AI?
Choose Light, Medium or Bypass for a proposed rewrite with a subscription. Review facts, meaning and citations afterward. A lower score does not prove better writing.
Is the AI detector free to use?
The website accepts free checks up to 1,000 words. Signed-in free accounts have three checks; longer documents require a subscription. Rewriting also requires a subscription.
What's the difference between an AI detector and a plagiarism checker?
AI detection estimates writing patterns. Plagiarism checking searches for overlap with other sources. An AI score does not establish originality or verify citations.