AI Detector Free

EssayPro's AI Detector is a free, no-signup web tool that analyses a pasted draft and returns a percentage score estimating how much of the text reads as machine-generated. It is aimed at students checking a paper before submission and at instructors screening coursework, and it is built to flag three distinct cases rather than one: fully AI-written passages, AI text that has been paraphrased or run through a humanizer, and hybrid documents where AI sentences are interleaved with the author's own writing.

The detector is model-agnostic by design — EssayPro states it covers output from ChatGPT, Claude, Gemini and other mainstream assistants — and reports results at sentence level, so a flagged document shows which passages triggered the score instead of a single opaque number. The vendor emphasises a low false-positive rate, which matters most in the education setting the tool targets, where a wrongly flagged human paragraph is more costly than a missed AI one.

Pricing: free to use in the browser, with no account required for a check.

Worth knowing: the tool is published by EssayPro, an academic writing-services company, and the results page upsells human proofreading, rewriting and editing services on the same site. Treat the score as an indicator rather than an authoritative verdict — no AI detector on the market, this one included, publishes independently audited accuracy figures, and detection scores should not be the sole basis for an academic-integrity decision.