ChatDOC
: How to use it, features, and the business problems it solves
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What is ChatDOC?
A 'chat with PDF' assistant that reads uploaded PDFs, Word files, scanned documents, and more, and answers questions while showing the source (exact passage, page, and table). Its TapSource feature lets you trace answers back to the original, and it understands tables and formulas.
Business problems it solves
About "ChatDOC"
What is ChatDOC
ChatDOC is a "chat with PDF" assistant where AI reads your uploaded documents and answers questions while showing the source (the exact passage, page, and table). Under the banner "Answers You Can Trust. Sources You Can See.," its biggest selling point is that you can trace, with a single click, exactly what each answer is based on. It is used by over 1,000,000 people worldwide.
ChatDOC's core is "TapSource," which traces an answer's basis back to the original. Click a citation in an answer to jump to the exact passage or table in the source. Beyond summarizing long texts, explaining complex concepts, and extracting information, it handles extraction of tables spanning pages and formula recognition. Answers use GPT-4 / GPT-4o (per the official site).
How to use
Upload documents, ask questions, and trace the sources to verify.
Upload documents
Upload PDFs, Word files, scanned docs, web pages, and more.
Ask questions
Ask for summaries, explanations, or information extraction in chat.
Check the source
Jump from an answer's citation (TapSource) to the original passage.
Span & build
Ask across multiple docs; developers embed via API/PDF Parser.
The free plan allows 2 files per 24 hours (up to 10 total), 20 pages per file, and about 20 questions per day. You can try it before considering Pro.
Key features
01Sourced document chat (TapSource)
Answers questions about uploaded documents while pointing to the exact passage in the source. Click a citation to jump to the original page or table, so you can verify the AI's answers yourself. Supports summaries, concept explanations, and information extraction.
02Tables, formulas, scans, many formats
Handles extraction of tables spanning pages and formula recognition. It supports OCR of scanned documents (Pro: 500 pages per 30 days), ingestion of PDF, Word, ePub, Markdown, TXT, and websites, multi-document questions, 25+ languages, and a prompt library.
03For developers (API & PDF Parser)
Offers the ChatDOC API and a PDF Parser that converts documents into structured JSON with headings, paragraphs, and tables. As preprocessing for RAG (retrieval-augmented generation), you can embed it into your own LLM apps.
Pricing
You can start for free; the only paid tier is Pro (the figures below are auto-renew prices; regular prices are higher).
| Plan | Price | Files | Pages/file | Main content |
|---|---|---|---|---|
| Free | $0 | 2/24 hrs (up to 10 total) | 20 pages | PDF only, ~20 questions/day |
| Pro | $8.99/30 days ($89.90/yr) | 300/30 days | Unlimited | All formats, OCR, formulas, GPT-4o, 300 questions/day |
Add-on packs (valid 90 days): files $0.29 each, pages $0.06 each, OCR pages $0.10 each. The API and PDF Parser are priced separately. Prices are in USD and subject to change; check the official site for the latest (as of August 2026).
How it differs from other document-chat / summary AIs
ChatDOC stands out by showing sources so you can trace an answer's basis back to the exact original passage, and by accurately reading tables, formulas, and even scanned documents. It differs in verifiability and reading accuracy from convenience-first PDF chats or note-taking-centric tools.
| Aspect | ChatDOC | ChatPDF | NotebookLM |
|---|---|---|---|
| Focus | Sourced document reading | Easy PDF chat | Notes/summaries from sources |
| Strength | Jump to the passage, tables/formulas | Quick Q&A | Sourced summaries, audio overviews |
| For developers | API, PDF Parser | Limited | — |
ChatPDF, for easy conversations with PDFs, and NotebookLM, which makes notes and summaries from sources, make good points of comparison. If you want to verify an answer's basis in the original while accurately reading tables and formulas, ChatDOC is a strong option.
The information on this page is based on the official site as of August 2026. Please check the official site for the latest specifications and pricing.
