Free AI Detector
A free AI detector is a transparent writing review tool that checks text for generated-writing signals such as formulaic phrases, repetition, even sentence rhythm, and missing concrete detail. Paste text to get an auditable signal report, sentence highlights, and manual review notes.
Analyze Text
Check for formulaic signals, repetition, and missing concrete detail.
Manual Review Checklist
Review method
How to use this AI checker
- 01
Paste the text you want to review.
- 02
Choose the content type and add any source, author, or draft-history notes.
- 03
Review the AI-likelihood score and signal breakdown.
- 04
Inspect sentence highlights for formulaic phrasing, repetition, and missing details.
- 05
Use the manual checklist before making any editorial or academic decision.
- 06
Copy the review report for your notes.
AI Detector FAQ
What is an AI detector?
An AI detector is a review tool that looks for writing signals associated with generated text, such as formulaic phrasing, repetition, even sentence rhythm, and missing concrete detail.
Can this tool prove that AI wrote something?
No. AI detectors cannot prove authorship with certainty. This tool gives a transparent signal report that should be paired with human review, source context, and draft history.
What text length works best?
A few paragraphs work better than a single sentence because sentence rhythm, repetition, and specificity signals need enough text to compare.
How should teachers or editors use the score?
Use the score as a review lead, not a verdict. Check the highlighted sentences, ask for sources or drafts, and consider legitimate reasons polished writing may sound formulaic.
Why does the tool show sentence highlights?
Sentence highlights make the score auditable. They show which lines triggered signals so reviewers can inspect the actual writing instead of trusting a black-box number.
Related Tools
Pair AI-signal review with source-first verification.
Lie Library tools help reviewers move from suspicion to evidence: check the writing signals, verify the claim, and inspect the sources before making a decision.