HAHuman
The passage did not trigger an AI flag in this check. The accompanying wording shows the strength of the assessment.
Free AI Detector & AI Text Checker
Check English text for AI-like patterns. Get a clear result and a report for your writing workflow.
Your text is sent for analysis when you select Check for AI.
How to read your resultHow to use the AI detector
Check an essay, article, or other English passage in a few steps. No account is required.
Add a complete passage
Paste 100–1,000 English words or import a UTF-8 .txt file. Include the paragraphs you want checked, with enough surrounding context.
Run your check
Select Check for AI to send your text for analysis. The detector checks the full accepted passage.
Review and keep your result
Read your detection result, then download a PDF report with your highlighted text if you need a record. Editing the passage clears the previous result.
What is an AI text detector?
An AI detector, also called an AI checker or AI content detector, analyzes writing for patterns associated with machine-generated text. It estimates how a passage compares with the writing patterns learned by a detection model.
HAT’s tool returns a document-level detection result. Use the result to get a clearer view of the passage’s writing patterns, then save a report for your review workflow.
How HAT analyzes your writing
The detection system analyzes patterns across your submitted passage and returns a clear result for the full text.
How to read your detection result
Your result gives you a clear classification for the passage you submitted. Review the highlighted text, select a sentence from the AI-like sentences list to find it in context, and download a report to keep the result.
AI
The analysis identified AI-like patterns in the submitted passage. Read the percentage and assessment wording alongside the result.
An AI checker for your writing workflow
Use the result to guide a review, alongside the evidence you already have.
Students and researchers
Review an essay or paper draft and keep your notes and version history. Follow your institution’s AI disclosure rules regardless of the score.
Writers and bloggers
Check a passage before publication, then review its sources, examples, and voice as part of your final edit.
Teachers and editors
Use a flagged result to start a conversation about sources and drafting. Give the writer an opportunity to explain their process.
Content teams
Include a check in your editorial review. Assess attribution, quality, and compliance with your own content policy before approving a draft.
How reliable is this AI detector?
Powered by HAT Advanced Algorithm, our detector uses advanced machine learning to assess AI-like patterns in English writing.
Context-aware analysis
The model evaluates learned language patterns across a passage, giving the surrounding text a role in the assessment.
Full-passage assessment
Every accepted passage is analyzed in full, so the result reflects the text you chose to check.
Comparative evaluation
Our evaluation work includes comparisons with established AI detection tools to understand how results vary across different texts.
Clear, consistent results
Consistent assessment criteria provide a clear classification, with guidance to help you interpret the result.
AI detection and plagiarism checks answer different questions
A text can be original and AI-written, or human-written and copied. One check does not replace the other.
| What you need to know | AI detector | Plagiarism checker |
|---|---|---|
| What does it look for? | Patterns associated with AI-generated writing | Text similarities to sources in its database |
| What does the result provide? | A detection classification | Potential matches and source references |
| Does HAT offer it on this page? | Yes, for accepted English passages | No, this tool does not search for copied sources |
What happens to your text?
You choose when to send it for detection.
When you import a .txt file
The browser reads the file and fills the editor. Selecting a file alone does not send its contents to the detection backend.
When you select Check for AI
The editor’s text is sent over HTTPS to HAT’s backend and detection service. The detector application does not save the submitted text or original file, and the browser does not keep your writing in local storage.
When you download a report
Your submitted text and verified detection result are used by HAT’s backend to generate a PDF in memory. The PDF is downloaded to your device with its sentence highlights; the application does not save a copy of the text or report. Downloading does not run another detection.
When you leave the page
Refreshing or leaving clears the editor. Reports you have downloaded remain on your device.
AI detector FAQs
Is this AI detector free to use?
Yes. You can check 100–1,000 English words per request without creating an account. Capacity and request limits apply, so a busy service may ask you to try again later.
Can I check text from ChatGPT, Claude, or Gemini?
You can submit an English passage regardless of which writing tool you used. HAT analyzes the text itself and does not identify its generating platform. We have not established an accuracy rate for each chatbot or model version.
Which languages and file types are supported?
This version is for English prose. It reads UTF-8 .txt files; for a PDF or Word document, copy the relevant text into the editor. It does not analyze images, handwriting, audio, or file metadata.
Why do I need at least 100 words?
The underlying model recommends passages of about 100 words or more. A complete passage gives more context than a sentence or short list. More text does not eliminate detection errors.
How accurate is HAT’s AI detector?
HAT uses advanced machine-learning analysis to identify patterns associated with AI-generated writing. AI detection is probabilistic, and no detector can guarantee 100% accuracy. Human writing can be flagged, and AI-generated text can go undetected. Consider the result alongside the writing, its sources, and the author’s drafting process.
What do the percentage and assessment wording mean?
The percentage is an AI detection score: a relative signal index, rather than a calibrated probability or the proportion of words written by AI. Lower values indicate more human-like signals; higher values indicate more AI-like signals. Wording such as possibly, likely, probably, and very likely expresses the strength of the assessment within the detector’s scoring rules. It does not state a separately validated accuracy or confidence percentage. Sentence colors indicate local AI-like patterns, with darker yellow representing stronger signals. They do not establish a sentence’s authorship or change the whole-text classification.
Will HAT agree with GPTZero or Turnitin?
Not necessarily. Detectors use different models, thresholds, and reporting rules. This page does not call GPTZero or Turnitin and cannot predict or reproduce a private report from another service.
Will humanizing text guarantee a different result?
No. Rewriting and detection are separate processes, and edited text can still be flagged. Use the humanizer to refine clarity and tone, then review whether the draft accurately expresses your intent.
Why is my AI detection taking longer?
Longer texts usually need more time to analyze. During busy periods, your request may also wait in a queue before analysis begins.
Why did the check fail or take too long?
The detection service may be busy or offline, and longer passages can take more time. Your text stays in the editor after an error. Wait a moment or try a shorter complete passage within the 100–1,000-word limit.
Make your next draft sound like you.
Refine clarity and tone with our text humanizer.