1. Paste writing
Drop in an essay, blog post, or mixed document. Short snippets are noisy; 300+ characters is the useful floor.
Free · No signup · Sentence-level
Free AI essay detector for ChatGPT, Claude & Gemini
Paste an essay or article. Get an overall AI probability, mixed-content AI fraction, and a sentence heatmap — powered by Sapling.ai.
0 words · 0 characters
Final verdict
Overall AI probability
0%
Likelihood the text as a whole was generated by AI.
AI fraction (mixed content)
0%
Share of sentences scoring 50% or higher.
Sentence heatmap
Green leans human. Amber mixed. Red leans AI.
How the detector works
2. Sapling scores it
The API returns a document probability, an AI-fraction for mixed work, and per-sentence scores.
3. Read the heatmap
See which sentences drive the verdict so you can review or rewrite only the flagged parts.
Who uses this tool
Teachers screening assignments, students checking drafts, editors reviewing guest posts, and publishers checking mixed human/AI copy. Scores are probabilities — not a substitute for academic judgment and not a sole basis for discipline.
FAQ
Is this AI essay detector free?
Yes. Free AI Essay Detectors on aiessaydetectors.com is free to use. No account is required.
Can it detect ChatGPT, Claude, and Gemini?
Yes. Sapling is trained to flag writing from ChatGPT, Claude, Gemini, and similar large language models. Heavily edited text can lower the score.
What is AI fraction vs overall probability?
Overall probability scores the document as a whole. AI fraction is the share of sentences that look AI-written — useful for mixed documents.
How accurate is an AI essay detector?
No detector is 100% certain. Use the score as evidence, not proof — especially on text under 300 characters.
Is my essay stored?
Text is sent only to Sapling’s API for analysis. This page does not keep essays on a Blogger server.