Plagiarism Detector & AI Checker

CopyChecker is a free all-in-one writing toolkit with a plagiarism checker, AI content detector, AI humanizer, AI grammar checker, PDF tools, AI reverse image search, and more. Trusted by students, educators, writers, and SEO professionals worldwide.

CopyChecker to give everyone access to world-class writing and content tools — completely free. Whether you're a student checking your essay, an educator verifying submissions, a content writer ensuring originality, or an SEO pro screening outsourced work — CopyChecker has you covered. Our AI Detector supports ChatGPT, Gemini, Claude, Grok, DeepSeek, and more. We also have a full PDF suite, reverse image search, grammar checker, and 20+ tools.