CopyChecker

CopyChecker is a free all-in-one writing platform and content verification platform designed for students, educators, writers, content creators, and SEO professionals. CopyChecker offering 20+ tools for writing, content verification, and document management. Its AI Detector identifies content from ChatGPT, Gemini, Claude, Grok, DeepSeek, Mistral, and Llama with percentage breakdowns and sentence-level highlights. The Plagiarism Checker scans billions of sources with detailed source links. Additional tools include a Grammar Checker, AI Detector, AI Humanizer, Sentence Rewriter, PDF editor suite, AI Reverse Image Search, and more. All tools run in-browser with no installation required. Free tier available; premium plans unlock higher usage limits.