Turn a pile of documents into a private knowledge base you can question
Drop in PDFs, Word files and web pages, then ask questions in plain language and get answers with the source passage attached. It can run entirely on your own machine.
What you end up with
- Hundreds of documents normalised into structured text instead of scattered files
- A Q&A interface that quotes the source paragraph behind every answer
- Data never leaves your machine, if you choose local deployment
The sequence
1. Turn documents into clean text
Scanned PDFs and heavily formatted Word files break here first. Parse them, then spot-check a dozen pages to confirm tables and headings survived. Most bad retrieval traces back to this step.
MinerUOpen source★ 82.2KAccurately convert PDF and Office documents to Markdown and JSON, suitable for direct use with AI models.doclingOpen source★ 69.3Kdocling is a document parsing tool that converts PDF, Word, and other documents into AI-friendly Markdown or JSON formats, making it easy to feed to large models.markitdownOpen source★ 191.5KConvert various office documents to Markdown format with one click, convenient for writing and organizing.2. Build the index and retrieval layer
This decides whether one question finds the right paragraph. Chunk size and whether you keep heading structure matter more than which model you pick.
3. Test retrieval before tuning generation
Write 20 questions whose answers you know the page of, and check only whether the right passage was retrieved. Wrong retrieval defeats any model; right retrieval lets an ordinary model succeed. This step gets skipped, and then everyone blames the model.
4. Put a usable interface on top
Connect retrieval to a chat UI and constrain the system prompt to answer only from retrieved passages, and to say so when nothing matches. Without that constraint the model starts inventing.
Only need one piece of this?
You don't have to build the whole chain. Every tool above is listed on its own, with a summary, pros and cons, and a starting point.
Read a full report first
A playbook gives you the order. A report gives you the route comparison, real costs, a day-by-day plan and the pitfalls — so you can decide which route fits.