ChatDOC

Freemium

AI document chat for readers who need summaries, explanations, and traceable answers.

What is ChatDOC?

ChatDOC is a browser-based AI document assistant for asking questions about uploaded files, summarizing long documents, and explaining complex passages. Its workflow connects answers to the underlying document so readers can inspect the evidence while they work.

Users can upload documents, ask questions across files, and organize material into collections. Alongside document chat, ChatDOC offers full-document translation and a PDF Parser API for converting PDFs into structured data.

What can ChatDOC do?

Trace answers to source passages

TapSource links answers to document context through clickable footnotes and highlighted quotes. Readers can also click key figures, such as amounts and percentages, to inspect their origins.

Read complex document elements

Document parsing handles formulas, images, and tables that span pages. OCR supports scanned material and became free for all users in December 2025.

Ask questions across files

Query multiple documents and organize them into collections. File sorting by upload time or recent queries helps users return to active material.

Translate complete documents

Translate PDF and DOC files into multiple languages. The feature was introduced in beta in June 2025; the homepage describes translation that preserves document layout.

Choose chat models

Chat includes a gpt-5-mini option. Custom model connections support providers including OpenAI, OpenRouter, and DeepSeek, with citations also available for custom models.

Extract PDF data through an API

The ChatDOC PDF Parser API generates document outlines and extracts tables, including complex layouts. JSON and Markdown outputs support integration into documentation, retrieval systems, and language-model workflows.

Use Cases

“Study technical material”

Ask for explanations of unfamiliar concepts in papers or manuals, then inspect the cited passages and relevant formulas or figures.

“Review figures in reports”

Locate amounts or percentages in lengthy reports and follow their source references to check the surrounding table or discussion.

“Research across a document collection”

Group related files and ask questions across them when an investigation depends on information spread through several documents.

“Prepare PDFs for software workflows”

Use the parser API to convert PDF content into structured JSON or readable Markdown for downstream applications.

Frequently Asked Questions

Which document formats does ChatDOC support?

The homepage lists PDF, DOC, DOCX, scanned documents, websites, EPUB, Markdown, and TXT. Its plan comparison lists PDF for Free and the broader format set for Pro.

Can I use ChatDOC on a phone?

The application states that mobile is unsupported and directs users to a computer. Recommended browsers are Chrome 91 or later, Firefox 115 or later, Safari 15.2 or later, and Microsoft Edge.

Is there a free option?

ChatDOC offers Free and Pro plans. The homepage advertises 100 free questions with no card required, plus subscription options for 30 or 360 days.

How large can uploaded files be?

The September 2025 update increased supported uploads to 200 MB, including large scanned documents.