ChatPDF screenshot

ChatPDF

ChatbotFree

Unlock PDF Insights with ChatPDF Backend API

Last updated Apr 29, 2026

Claim Tool

What is ChatPDF?

The ChatPDF backend API offers robust capabilities for extracting information from PDF files and crafting custom chatbots based on those PDFs. Users can utilize a free tier that includes 500 messages and 5,000 PDF pages per month, with paid plans available for higher usage. This service allows for manual or API-based PDF uploads, supports chatting with uploaded PDFs via stateless messages, and provides options for including PDF page references and streaming responses.

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.

Explore Top AI Use Cases

Tags

PDFcustom chatbotAPImanual uploadstateless messagesPDF referencesstreaming responses

ChatPDF's Pricing

Free plan available

User Reviews

Share your thoughts

If you've used this product, share your thoughts with other builders

Recent reviews

Top ChatPDF Alternatives

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.