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Free AI Content Checker
The AI Checker analyses text for signs of AI-generated writing using linguistic pattern detection. Unlike tools that rely on paid APIs, everything runs directly in your browser, meaning your text is never uploaded, stored, or shared with any server.
How the AI detector works
The tool examines several linguistic signals commonly associated with AI-generated writing. Burstiness measures how much sentence length varies. Human writing tends to mix short and long sentences, while AI text is often more uniform. Perplexity estimation looks at how predictable word sequences are, since AI models tend to favour common, expected phrasing.
Vocabulary diversity, repetition patterns, transition phrase overuse, and grammar consistency are also factored in. Each signal is combined into a single weighted score, giving an overall AI probability estimate along with a breakdown of which patterns were detected.
Who uses this AI checker
Students use it to review their own essays and assignments before submission. Writers and editors use it as a quick self-check on drafts. Educators use it as a first-pass indicator, alongside their institution's official policies and tools, rather than as a final verdict.
Frequently asked questions
Is this AI checker free?
Yes, The AI Checker is completely free to use with no sign-up required.
Does this AI checker store my text?
No. All analysis happens entirely in your browser. Your text is never sent to a server, stored, or logged.
How accurate is the AI checker?
The AI Checker provides an estimate based on linguistic patterns such as sentence structure and vocabulary diversity. No AI detector is 100% accurate, so results should be used as a guide rather than definitive proof.
Can this AI checker detect ChatGPT, Claude, and Gemini text?
Yes, the tool analyses writing patterns common across major AI models including ChatGPT, Claude, Gemini, and Llama, with selectable detection profiles for each.