ChatPDF is a conversational AI tool that allows users to upload PDF documents and interact with them through a natural-language chat interface. Users can ask questions, request summaries, and extract specific information from documents within seconds. The platform uses dynamic routing between GPT-4o and GPT-4o-mini models to optimize for speed, quality, and efficiency in every query.

Beyond PDFs, ChatPDF supports a growing range of file formats including Word (.doc, .docx), PowerPoint (.ppt, .pptx), Markdown (.md), and plain text (.txt) files, as well as YouTube video analysis. The side-by-side interface keeps the document and chat visible together, with clickable citations that scroll directly to the source location in the original file.

Users can create folders to organize files and run multi-document conversations, enabling comparisons and cross-references across multiple sources in a single session. ChatPDF is fully multilingual, accepting documents in any language and allowing users to ask questions and receive answers in a different language if desired.

The platform requires no account to get started and offers a free plan supporting two document analyses per day. A paid Plus plan is available for users who need unlimited document analysis and access to advanced features. Security is handled with SSL encryption and SOC2 Type II certified storage, with users retaining full control over their uploaded documents.