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Chat with documents (pdf, docx, txt) using ChatGPT and Langchain
| Date | Stars |
|---|---|
| 2026-07-31 | 285 |
| 2026-08-01 | 285 |
| 2026-08-02 | 285 |
| 2026-08-06 | 285 |
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# Chat with documents using LLM This is a Bellingcat [hackathon](https://www.bellingcat.com/april-hackathon-announcement-mar-2023/) submission ## Team Members [Radu Ciocan](https://www.linkedin.com/in/ciocan/) - code [Ana State](https://www.linkedin.com/in/anastate/) - design ## Tool Description A chat interface that allows users to upload PDF/DOCX documents and and chat with them using ChatGPT as the large language model. https://user-images.githubusercontent.com/4984377/233852126-6828f7b6-cfc3-485c-a893-c2ce9e6b345f.mp4 ## Installation 1. Make sure you ave installed Node v18 or later 2. Download the tool's repository using the command: ```bash git clone [email protected]:ciocan/langchain-chat-with-documents.git ``` 3. Move to the tool's directory and install the tool ```bash cd langchain-chat-with-documents npm install ``` 4. Copy the .env.example into .env file and add the following variables: ```bash WEAVIATE_HOST= # do not use https:// just the domain like bellingcat-xxx.weaviate.network WEAVIATE_API_KEY= # cloudflare r2 CLOUDFLARE_ACCOUNT_ID= CLOUDFLARE_SECRET_KEY= CLOUDFLARE_SECRET_ACCESS_KEY= # open ai key OPENAI_API_KEY= ``` Weaviate is an open source vector database where the documents are vectorized and indexed. You can install it locally or use their [free cloud](https://console.weaviate.cloud/). Cloudflare R2 is a object storage solution compatible with AWS S3. They have a free tier of 10gb. [More info](https://www.cloudflare.com/products/r2/) Signup for an OpenAI API key [here](https://platform.openai.com/) 1. Start the tool ```bash npm run dev ``` ## Tech Stack This is a [T3 Stack](https://create.t3.gg/) project bootstrapped with `create-t3-app`. - [Next.js](https://nextjs.org) - [Tailwind CSS](https://tailwindcss.com) - [tRPC](https://trpc.io) Additional libraries: - [Zustand](https://github.com/pmndrs/zustand) - Used for state management - [Mantine UI](https://mantine.dev) - Used for awesome UI components - [LangChain](https://js.langchain.com/docs/) - Used for interacting with the LLM model (OpenAI) ## High Level Architecture 
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Read on GitHubWould you bet a product on this? Bounded 0–100 and slow moving.
matched fp:2bd2d13a86faaf7b, llm:description: 'Chat with documents (pdf, docx, txt) using ChatGPT and Langchain'; topics: langchain, llm, chatgpt
matched fp:2bd2d13a86faaf7b, llm:description: 'Chat with documents (pdf, docx, txt) using ChatGPT and Langchain'; topics: langchain, llm, chatgpt
matched fp:2bd2d13a86faaf7b, llm:description: 'Chat with documents (pdf, docx, txt) using ChatGPT and Langchain'; topics: langchain, llm, chatgpt