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Free AI Detector

Check if your text might be flagged as AI-generated. Paste your writing below and get an instant score.

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How AI Detection Works

Perplexity Analysis

AI text is highly predictable. Detectors measure how "surprising" each word choice is — human writing scores higher.

Burstiness Check

Humans vary sentence length naturally — short punchy sentences mixed with long complex ones. AI tends to be uniform.

Pattern Recognition

Certain phrases, transitions, and structural patterns are strong AI signals. Detectors look for these fingerprints.