Multilingual AI Content Detector





See it in action
Multilingual, fast, and precise AI content detection for your texts and documents
Supports Top AI Models
Detect text written with ChatGPT, Gemini, Claude, Llama, and other leading AI tools.
50+ Languages
Detect AI-generated text in local-language documents, including English, Spanish, French, German, and many more.
Full-Document Score
Get an overall AI probability score for your entire document at no cost.
Sentence-Level Breakdown
See exactly which sentences are flagged as likely AI-generated.
Upload Any Format
Upload Word, LibreOffice, Pages, or PowerPoint files, or paste plain text directly.
Downloadable PDF Report
Download a PDF report to share or submit proof of originality instantly.
Who relies on AI detection — and why
An AI detector analyzes text patterns to determine whether content was written by a human or generated by tools like ChatGPT, Gemini, or Claude. It helps educators, publishers, and professionals verify the authenticity of any written work — in seconds.
Built on real plagiarism expertise, adapted for the age of AI
Plag AI Detector is more than a basic AI checker. It combines more than a decade of originality-checking experience with multilingual detection, document uploads, downloadable PDF reports, privacy-aware design, and constantly updated algorithms that keep pace with modern AI writing tools.