AI Text Checker
Analyze the style signals that tend to separate AI and human writing: sentence rhythm, LLM phrasing, repetition. Honest readings, no invented percentage.
balanceWhy no percentage
Tools that print a confident AI percentage regularly flag human writing: independent testing found real-world false positive rates far above the marketing claims, and non-native English writers get hit the hardest. This analyzer shows measurable style signals with their reasoning and leaves the judgment to you. Never treat any detector output as proof of misconduct.
lockPrivate by design
Analysis is pure computation in your browser. The text is never sent, stored, or used for anything, which also means no essay ends up in someone's training data.
What is the AI Text Checker?
An AI text checker looks for the statistical fingerprints that large language models tend to leave in prose. This one measures sentence rhythm, opener variety, LLM-favorite phrasing, phrase repetition, punctuation habits, and paragraph shape, then shows each reading with its reasoning. What it refuses to do is print a confident percentage: independent testing keeps showing that percentage-style detectors flag real human writing at rates far above their marketing claims, with non-native English writers hit hardest. Style signals are evidence for your judgment, not a verdict, and the analysis runs entirely in your browser.
How to use the AI Text Checker
- 1
Paste the text
At least 120 words and 5 sentences. Below that, style statistics are noise and the tool says so instead of guessing.
- 2
Read the overall lean
The summary states whether the measurements lean AI-like, lean human-like, or point in both directions, which is the most common honest outcome.
- 3
Inspect each signal
Every measurement shows its value, its threshold, and why it matters, from sentence rhythm to em-dash density. You see the reasoning, not a black box.
- 4
Judge like a human
Combine the signals with what you know about the writer and the context. No detector output, including this one, is proof of anything on its own.
Frequently Asked Questions
Why does this tool refuse to give an AI percentage?
Because the science does not support one. Vendors advertise 98 or 99 percent accuracy, yet independent real-world tests have found double-digit false positive rates on human writing, and a Stanford study showed detectors flagging most essays by non-native English speakers. A percentage invites treating a guess as proof, and people get hurt that way.
What signals does it measure?
Sentence length variation, variety of sentence openers, frequency of LLM-favorite words and phrases, repeated three-word chains, dash and semicolon density, and paragraph size uniformity. Each is a documented heuristic with visible thresholds.
Can AI text pass as human here?
Yes, easily: a good prompt or a light human edit shifts every one of these signals. That is exactly why the tool presents leans instead of verdicts, and the same limitation applies to every detector on the market whether they admit it or not.
Can human writing look AI-like?
Absolutely. Formal, polished, or non-native writing often shows even rhythm and formal connectors. If your own writing leans AI here, that is a demonstration of why detector scores should never decide accusations.
Is the text I paste stored or sent anywhere?
No. The analysis is plain computation inside your browser with no network involved. Unlike online detectors, nothing you paste is retained or added to any dataset.