ChatDOC
Answers you can trust. Sources you can see.
About ChatDOC
ChatDOC is an AI document assistant that lets you upload PDFs, Word files, scans, EPUBs, Markdown, text files, and web pages, then ask questions and get answers with clickable citations back to the source passage. It is built on its own PDF parser that handles tables spanning pages, formulas, images, and scanned text, and it can chat across whole collections of files at once.
Pros & Cons
Pros
- Clickable TapSource citations make it fast to check each answer against the original page
- Handles hard-to-parse content well: cross-page tables, formulas, scanned pages, and multi-column layouts
- Collections let you query dozens of related files in one conversation
- Pro is inexpensive at $8.99 per 30 days, with a cheaper 360-day option
- Supports a wide range of formats, including EPUB, Markdown, and live web pages
- API available for developers who want the parser or document chat in their own apps
Cons
- Free plan is capped at 10 uploads and 100 questions in total, so it works only as a trial
- Free plan accepts PDFs only; other formats require Pro
- Image analysis costs extra even on Pro
- Browser-based with no native mobile apps
- Answers can be brief and occasionally miss context on long, complex documents
Key Features
Chat with documents
Ask questions about uploaded PDFs, DOC/DOCX, scanned files, EPUB, Markdown, TXT, and websites, and get answers grounded in the file content.
TapSource citations
Every answer links back to the exact passage, table cell, or quote in the original document so you can verify it in one click.
Multi-document collections
Drag in a folder as a collection and ask questions across many files at once; Pro removes the per-collection file limit.
Layout-aware PDF parsing
Its parser reconstructs cross-page tables, formulas, images, and multi-column layouts so answers draw on structured content rather than raw text.
OCR for scanned files
Recognizes text in scanned PDFs and images so non-searchable documents can be queried.
Formula recognition and explanation
Detects mathematical formulas in papers and explains them in plain language (Pro).
Layout-preserving translation
Translates documents while keeping the original layout; the free plan translates 3 pages per file, Pro is unlimited.
Image analysis
Ask questions about charts and figures inside documents (Pro, paid add-on).
Prompt library
Save and reuse prompts for recurring document tasks such as summaries or data extraction.
ChatPaper, browser extension, and API
Companion ChatPaper tool for research papers, a browser extension, and a developer API for the PDF parser and document chat.
Pricing
- 5 file uploads per day (10 in total)
- 20 questions per day (100 in total)
- 300 pages per file, 60 MB max file size
- OCR and TapSource citations
- Translate 3 pages per file
- 30 files per collection
- PDF files only
- Billed per 30 days, or $89.90 per 360 days
- 300 file uploads per 30 days
- 300 questions per day
- Unlimited pages per file, 200 MB max file size
- Unlimited OCR and TapSource citations
- Formula recognition and unlimited file translation
- Image analysis (paid add-on)
- Unlimited files per collection
- PDF, DOC, DOCX, scans, websites, EPUB, MD, TXT
Best For
Academic research
Students and researchers query papers, get formula explanations, and jump to the cited passage instead of reading every page.
Financial and report analysis
Analysts pull figures from annual reports and filings, including tables that span multiple pages, with sources attached.
Legal and contract review
Lawyers and HR teams ask targeted questions about clauses in contracts and policies and verify each answer against the text.
Technical documentation lookup
IT and support teams load manuals into a collection and find answers across all of them at once.
Reading foreign-language documents
Translate documents while keeping their layout, then chat with them in more than 25 languages.
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