AI Detector & AI Checker - Free AI Text Detector
Scan AI text for AI-like patterns, confidence signals, and detector risk before you publish or submit.
Scan AI text for AI-like patterns, confidence signals, and detector risk before you publish or submit.
Writers often compare Lumi results with the services already in their workflow so they can spot passages that still feel overly uniform, generic, or machine-like.






The AI detector helps you notice repeated sentence structures, flat transitions, and phrasing that feels too polished or generic for the context.






Most users rewrite first, then run a last detection check to catch sections that still feel too uniform before the draft goes out.
Customers use the detector to reduce uncertainty, prioritize edits, and understand which passages need a more natural rewrite.
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active users worldwide
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Alex Rodriguez
Law Student, Harvard University
It helps me turn rough AI-assisted drafts into something I would actually submit.
I use Lumi to smooth repetition, tighten sentence flow, and make sure the final draft sounds like me before I hand anything in.
Maya Chen
Tech Blogger, TechCrunch
Our first drafts sound less generic and need fewer manual edits.
We use Lumi to reshape outlines and AI-assisted copy into publishable posts with clearer tone, structure, and pacing.
Jordan Smith
PhD Candidate, MIT
It catches awkward phrasing before it reaches my team.
The rewrite and grammar workflow gives me a cleaner version without losing the original point, which saves a lot of revision time.
4.8/5 from 1,240 reviews
From student drafts to client deliverables, the detector gives teams one more review layer before final approval.







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Answers about what Lumi’s AI detector and AI checker measure, how to interpret the score, and how to use them in your editing process.
It reviews patterns that often make text feel machine-like, such as repetitive structure, generic transitions, and overly consistent phrasing. The score is meant to support review, not replace judgment.
Not necessarily. A high score usually means the draft reads as more formulaic or uniform than expected. Some technical, formal, or highly structured writing can also look AI-like even when it is accurate.
Review the passages that feel repetitive or generic, then rewrite them for specificity, stronger transitions, and a more natural tone. Many users run the text through Lumi Humanizer after the initial check.
You will get the best signal from a substantial sample rather than a single sentence. Longer inputs give the detector more structure and rhythm to evaluate.
Yes. It is useful anywhere you want an extra review step before publishing, submitting, or handing a draft to someone else.
No. Detector scores should be treated as directional signals. Different tools weigh patterns differently, so the best workflow is to use the result as a cue for revision, not as an absolute verdict.
The most common follow-up tools are AI Humanizer for more natural phrasing, Grammar Checker for cleanup, and Paraphrase Tool for targeted rewrites of flagged sections.
Yes. It gives you a way to review how your draft reads before you rely on it, which is especially helpful when quality, tone, and disclosure standards matter.
Still have questions? Visit our help center or read our blog guides for more insights.