Check a complete passage
Paste connected paragraphs. Paid subscribers can also upload a supported document. Review the extracted text and word count before you scan.
Explore the detector →AI writing checks, with context
AI detector for your
next draft.
Check text for AI writing patterns and review readability in one place. Get a starting point for a closer review of essays, articles, and everyday writing.
5 free scans per day · Up to 750 words per scan · No payment required
AI Detector
Detect AI in your content for free.
AI Humanizer
Revise AI-assisted text for clarity and flow.
Recent History
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Drag and drop your file here
up to 4MB
Detection Score
Higher means a stronger AI writing signal. This is an estimate, not proof of authorship.
Readability
Rates how easy the text is to read on a scale from 0 to 100 — higher scores mean easier reading.
Grade Level
Indicates the U.S. school grade level needed to understand the text — higher education levels mean more complex reading.
A detection score is a signal for review, not proof of authorship. Check sources and drafting context before making a decision. Read about scores and limitations.
From a check to a better review
Know what to look at next.
Read the result in context
Consider sources, notes, and revisions. The detection result and readability estimates answer different questions.
Understand the score →Make a useful revision
Clarify the argument, verify claims, and add specific examples. Strong writing comes from the substance of the work.
Use the editorial checklist →A workflow for your writing
Different documents.
Different review questions.
An essay needs a clear argument and accurate citations. A marketing article needs useful information and verifiable claims. Start with a guide that matches the work in front of you.
AI detection, explained
What does an AI detector do?
An AI detector analyzes patterns in text to provide a signal for further review. It cannot prove who wrote a passage, identify a specific AI account, verify facts, or establish plagiarism.
Is AI Detect free?
Yes. Free detection includes 5 scans per day and up to 750 words per scan. Paid plans increase those limits and include a separate humanization allowance. No payment is required for free detection.
Can AI detectors make mistakes?
Yes. Human writing can be flagged, and AI-assisted writing can be missed. Short, edited, formulaic, or mixed-origin text can be difficult to interpret. Use a score with the writing, its sources, and its drafting history.
Is AI detection the same as plagiarism detection?
No. AI detection looks at writing patterns. Plagiarism or similarity checking compares text with sources. A detection score does not establish originality or correct citation.
Does AI Detect predict Turnitin or GPTZero results?
No. AI Detect is independent of those services. Different models and score definitions can produce different results for the same text.
Need room for more drafts?
Compare daily scans, document limits, and billing options. Paid plans also include humanization for revising text.