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Free AI Writing Detector
Paste your writing below. We'll detect AI-generated patterns and show you exactly how to make it sound human.
SCANNING FOR AI PATTERNS...
How It Works
AI models tend to write sentences of very similar length and structure. We measure variance — human writers naturally mix short punchy sentences with longer ones.
Words like "delve", "tapestry", "nuanced", "pivotal", and "it's worth noting" are statistically overrepresented in AI output. We flag these specifically.
Humans write with opinions, uncertainty, and lived experience. AI tends toward confident, neutral, encyclopedic prose with no real point of view.
"Furthermore", "Moreover", "In conclusion", "It is important to note" — AI loves these. We detect repetitive paragraph-opening patterns that signal automated generation.
Results are probabilistic. A high score means AI-like patterns were detected — not definitive proof of AI authorship.
FAQ
Yes, completely free. No account, no email, no usage limits. Paste your text and get instant results.
Very strong on heavily AI-generated text. Less reliable on lightly edited AI output or highly formal human writing (legal, academic). No detector is 100% accurate — always treat results as one signal among many.
Yes. Reliable AI Check detects patterns common to ChatGPT, Claude, Gemini, Copilot, and most major large language models — they all share similar stylistic tendencies.
No. Your text is sent directly to the AI API for analysis and is not stored on any server. We don't log, save, or share your content.
It's useful as a first-pass screening tool, but we strongly recommend not using any AI detector as sole evidence of academic misconduct. A high score warrants a conversation, not an automatic penalty.
At least 30 words for a result, but 150+ words gives significantly more reliable analysis. Very short texts don't have enough patterns to score accurately.