PaperLens lets users upload PDFs and ask questions, with answers taken from the documents.
What I built
PDF upload and processing
LangChain RAG pipeline for document answers
Chat history per document
React frontend with a Node.js backend
Tech stack: React, Node.js, LangChain, OpenAI
0 likes · 0 views · Nov 11, 2026
Chat with your PDFs and get answers from your own documents.
