CheckerAI

CheckerAI is a free AI checker and AI detector that flags signs of AI writing from ChatGPT, GPT, Claude, and Gemini, with an overall score and highlighted passages. No sign-up required. Paste text or upload PDF, Word, TXT, or Markdown (up to 20 MB), then review the score and highlighted passages. Meant for essays, student work, articles, and team content review—not proof of authorship by itself.