Dechecker

Paste in an essay, article or draft and find out which sentences read as machine-written.

Dechecker is an AI detector that scans text for output from models such as ChatGPT, GPT-4, Claude, Gemini and LLaMa, then marks the exact sentences it thinks are AI-generated rather than giving you one score for the whole piece.

That sentence-level view is the most useful part, because you can fix a few lines instead of rewriting everything.

Dechecker also works as a humanizer.

It offers rewriting suggestions built for making text more original and more natural to read, and it claims 3x more original and 2x more readable results, though those figures are its own.

Detection covers multiple languages, and reports include scores along with suggested improvements.

The short description says it is free to use.

Teachers, students and content writers checking their own work are the obvious audience.