T-Checker

T-Checker is a free AI writing detector designed for students, educators, researchers, and academic writers. Paste an essay, assignment, research paper, or other written draft to receive an instant AI detection score and sentence-level highlights showing passages that may contain AI-like writing patterns. The tool works directly in the browser and requires no sign-up, making it suitable for quick pre-submission checks. T-Checker can help users identify repetitive, predictable, or overly uniform language and decide which sections may need closer review or revision. AI detection results are probability-based signals rather than definitive proof that a text was generated by AI. Scores should be interpreted alongside the writer’s drafts, sources, writing history, and human judgment. T-Checker is an independent service and is not affiliated with or endorsed by Turnitin.