I Built a RAG App That Chats With Any PDF — Here's How

TL;DR: I built DocMind — a multimodal RAG (Retrieval-Augmented Generation) app that lets you upload any PDF, image, or document and ask questions about it in plain English. No API keys needed — it runs entirely locally using Ollama for the LLM and Xenova Transformers for embeddings. This post walks through the full architecture, the chunking strategy, the vector similarity search, and the code. The Problem You have a 200-page PDF — a legal contract, a research paper, your company'...