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Abdelrahman-Atef-Elsayed / ChatPDF

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A lightweight yet powerful RAG-based PDF chat app built with Streamlit. Supports multi-PDF upload, hybrid retrieval using FAISS + BM25, streaming AI responses, persistent vector storage, source citations, and local/offline usage with Ollama — all without heavy frameworks like LangChain or LlamaIndex.

lightweight local offline bm25 streamlit chatpdf langchain-python llamaindex retrieval-augmented-generation ollama powerfull-coding faiss-vector-database rag-chatbot
  • Updated May 20, 2026
  • Python

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