Create a Chat App for PDF Files: Step-by-Step Tutorial


This video tutorial guides viewers through the process of creating a chat app that interacts with PDF files. The app allows users to upload a PDF file and ask questions directly from that file, receiving responses based on the data in the PDF and a large language model (LLM) from OpenAI.

App Architecture and Technologies

The app consists of a front-end and a back-end. The front-end utilizes Streamlit, a Python library, to create a user-friendly graphical user interface (GUI). The back-end processes data, generates embeddings, and produces responses using the OpenAI API.

Prerequisites and Setup

The tutorial assumes basic Python knowledge and provides a step-by-step process for building the app. It utilizes Visual Code Studio as the development environment and recommends creating a new virtual environment for each project.

Step-by-Step Guide

The tutorial covers the following steps:

Setting up the Project:

Create a new Python project and install the required packages.
Set up Streamlit for creating the GUI.

Creating the Front-End:

Design the user interface using Streamlit.
Add functionality for uploading PDF files and displaying responses.

Building the Back-End:

Load the OpenAI LLM.
Create a function to process PDF files and generate embeddings.
Implement the logic for generating responses based on user prompts and embeddings.

Integrating Front-End and Back-End:

Connect the front-end and back-end components.
Handle user interactions and display responses.

Testing and Deployment:

Test the app to ensure it functions correctly.
Deploy the app to a cloud platform or host it locally.


This comprehensive tutorial provides a detailed guide for creating a chat app that interacts with PDF files. By leveraging Streamlit and the OpenAI API, users can build an app that allows users to engage with PDF content in a conversational manner. The tutorial is suitable for developers with basic Python experience and offers a hands-on approach to learning and creating innovative applications.

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