ChatPDF
ChatbotFree
Unlock PDF Insights with ChatPDF Backend API
Last updated Apr 29, 2026
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What is ChatPDF?
ChatPDF's Top Features
Key capabilities that make ChatPDF stand out.
Programmatic PDF information extraction
Custom chatbot creation from PDFs
Free tier with 500 messages/month and 5,000 PDF pages/month
Manual and API-based PDF uploads
Stateless chat messaging
PDF page references in responses
Streaming word-by-word responses
Simple deletion of PDFs via API
Multi-language support
Multiple PDF chats in one conversation
Use Cases
Who benefits most from this tool.
Students
Study effectively for exams, assist with homework, and resolve multiple-choice questions.
Researchers
Quickly extract information from scientific papers, academic articles, and books.
Professionals
Navigate through legal contracts, financial reports, manuals, and training materials swiftly.
Developers
Integrate PDF information extraction and custom chatbot functionality into applications.
Educators
Provide students with quick answers and resources from PDF textbooks.
Business Analysts
Extract key data and insights from market research reports and whitepapers.
Legal Teams
Efficiently analyze and cross-reference legal documents and contracts.
Healthcare Professionals
Retrieve information from medical journals and patient records easily.
Marketers
Analyze and summarize marketing materials and reports for strategic insights.
Financial Advisors
Get fast insights from financial statements and investment reports.
Tags
PDFcustom chatbotAPImanual uploadstateless messagesPDF referencesstreaming responses
ChatPDF's Pricing
Free plan available
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Frequently Asked Questions
What is the ChatPDF backend API?
The ChatPDF backend API allows users to programmatically extract information from PDF files and create custom chatbots based on those PDFs.
Is there a free tier available for ChatPDF?
Yes, the free tier includes 500 messages and 5,000 PDF pages per month.
How can I upload a PDF to ChatPDF?
You can upload PDFs manually on ChatPDF.com or use the API to add PDFs from a URL or by file upload.
What are the limitations on PDF uploads?
PDFs are limited to 2,000 pages or 32 MB per file.
How do I find my API key?
The API key can be found in the Developer settings under My Account on ChatPDF.com.
Can I include references to PDF pages in the responses?
Yes, by adding the 'referenceSources: true' field in the request body, responses will include PDF page references.
Is it possible to stream responses?
Yes, you can stream responses word by word by including the 'stream: true' field in the request body.
How do I delete PDFs?
To delete PDFs, use the endpoint provided in the documentation, which involves sending an array of source IDs.
Can I use the API key in frontend applications?
No, the API key should be kept secret and used only in secure backend environments.
What should I do if I need more than 5,000 PDF pages per month?
You should look into the paid plans that ChatPDF offers for higher usage.