Free AI checker and detector with signal breakdown
Free AI detector
Paste text into our free AI checker and detector to get an AI-likelihood estimate and see which common writing patterns show up. Results are estimates only, not proof of authorship.
No detector is definitive. Use scores to guide editing, not to make final authorship claims.
How it works
Use this AI checker and detector to estimate AI-likelihood from writing patterns.
The scan looks for phrasing habits common in model-generated drafts and returns a score plus the signals it found.
- 01
Paste your text
Drop in an essay paragraph, email draft, blog section, or any passage you want to review.
- 02
Run the scan
Refine estimates AI-likelihood from 0–100 and lists the writing patterns it finds in your sample.
- 03
Review the signals
Use the score and signal list to guide edits. Treat the output as an estimate, not a final verdict.
What the signals mean
Patterns that often show up in AI drafts.
These signals are editing clues, not automatic proof. Human writers can use some of the same structures.
- Repetitive cadence
- Uniform sentence length, repeated openers, and predictable rhythm can make drafts feel model-generated.
- Filler phrases
- Bloated wording like "in order to" or "it is important to note" often shows up in AI first drafts.
- Em-dash overuse
- Frequent em dashes used for drama or asides are a common surface tell in AI prose.
- Rule-of-three lists
- Ideas forced into neat triplets can sound comprehensive without adding real specificity.
- Negative parallelism
- Constructions like "not just X, but Y" create instant contrast that can feel staged.
- Promotional adjectives
- Brochure-like hype such as "vibrant" or "groundbreaking" can make neutral copy sound like an ad.
- Vague attributions
- Phrases like "experts say" or "studies show" without sources can make claims feel hollow.
Specialized checks
AI checker and detector pages for specific workflows.
Start with the free scan above, or jump to a focused page for ChatGPT drafts, essays, or Turnitin context.
ChatGPT detector
Check whether text reads like ChatGPT output with signals tuned to delve-class vocabulary, em-dash density, and rule-of-three lists.
AI essay checker
Scan student essays for AI writing patterns before submission or grading, with revision guidance for students and teachers.
Turnitin AI detector guide
Understand how Turnitin AI detection works, what score thresholds mean, and what students should know before submitting.
Honest limitations
No detector is definitive.
AI detection tools estimate likelihood from surface patterns. They cannot prove who wrote a passage or whether a model was used. Scores can be wrong in both directions.
Short samples, heavily edited drafts, and polished human writing can produce misleading results. Use this tool to spot stiff phrasing and guide revisions—not to make accusations or bypass review policies.
If a draft scores high, edit for specificity and voice, or try Refine's humanizer to smooth robotic phrasing. Always verify facts and follow your institution or publisher guidelines.
FAQs
AI detector FAQs
Straight answers about accuracy, signals, and how to use detection estimates responsibly.
Can't find what you're looking for? Contact our customer support team
Ready to refine your draft?
Humanize your AI text in seconds.
Paste your content into Refine and turn stiff, robotic writing into natural copy that sounds like you.