ChatPDF AI
ChatPDF lets researchers, students, and professionals ask questions about documents, summarize them, and compare files. Cited answers help users locate and verify information in their source material.
One of 143 tools in Research
Who it's for
- Researchers reviewing scientific papers, academic articles, or books who need answers tied to document sources.
- Students preparing for exams or working through homework with course documents.
- Professionals reviewing legal contracts, financial reports, manuals, or training materials.
Not the right fit if…
- People who need to analyze more than 2 documents per day without paying: the free plan is limited to 2 documents daily.
- People who need saved chat history or multi-document chats without an account: the page says these features require a free account.
How it fits your workflow
Upload or drop a document, or paste text or a link, then ask a question or request a summary. The page lists PDF, Word, PowerPoint, Markdown, and text file support.
Review the response alongside the document. Citations point to source content, and folders let account holders ask questions across multiple files in one conversation.
Users can try the core service without an account. A free account unlocks saved chat history and multi-document chats; shared PDF links can be managed or revoked.
Pricing
Free: The free plan allows analysis of 2 documents per day. The site also says users can try the core service without an account.
Free
Free
- · Analyze 2 documents per day
- · Core document chat can be tried without an account
ChatPDF Plus
Price not stated
- · Unlimited document analysis
- · More advanced features
Prices checked on Oct 15, 2026 from the vendor's site. They can change; confirm before you buy.
Key features
- Document questions and summaries
- Ask questions about a document or request a summary to find key information without reading every page.
- Cited answers
- Responses include citations linked to source content. The side-by-side view keeps the chat and document visible together, and citations can take users to the relevant PDF location.
- Multi-file chats
- Add files to a folder and ask questions across multiple documents in one conversation, including questions that compare content or find connections.
- Multiple document formats
- The FAQ lists PDF, Word (.doc and .docx), PowerPoint (.ppt and .pptx), Markdown (.md), and text (.txt) support.
- Multilingual document chat
- Upload documents in any language and ask questions in a preferred language, including asking about a document in a different language.
- Document sharing controls
- Users can generate links to share specific PDFs, manage access rights, and revoke sharing permissions.
Limitations to know
- The free plan is limited to analyzing 2 documents per day.
- A free account is required for saved chat history and multi-document chats.
Alternatives to consider
-
PDFChat
Choose it if you need the specifically listed capabilities for table interpretation and image or formula analysis.
Getting started
- Open ChatPDF and upload or drop a file, or paste text or a link.
- Ask a question or request a summary.
- Check cited source material alongside the chat response.
- Create a free account for saved chat history or multi-document chats.
Frequently asked questions
Is ChatPDF free?
The free plan allows users to analyze 2 documents every day. ChatPDF Plus offers unlimited document analysis and more advanced features; its price is not given on the page.
Which file types does ChatPDF support?
The FAQ lists PDF, Word (.doc and .docx), PowerPoint (.ppt and .pptx), Markdown (.md), and text (.txt) files.
Can I use ChatPDF without an account?
Yes. The page says users can try the core features without an account. A free account unlocks saved history and multi-document chats.
Can I chat with multiple files?
Yes. Create a folder, add files, and ask questions across them in one conversation, including questions that compare content or find connections.
Does ChatPDF support different languages?
Yes. The page says users can upload documents in any language and chat in a preferred language, including asking questions in a different language from the document.
How does ChatPDF protect documents?
The FAQ states that documents are encrypted during transfer and while stored, that its storage provider is SOC 2 Type II certified, and that users can delete their documents.
Which AI models does ChatPDF use?
The FAQ says the platform routes queries dynamically between GPT-4o and GPT-4o-mini.