Build a Secure File Sharing Web App with Python & Flask (Step-by-Step)

In this tutorial, we’ll build a simple but powerful file-sharing web app using Python and Flask. Users will be able to: Upload files Download shared files Delete files View file metadata Access a simple API endpoint By the end, you'll have a mini Dropbox-style file sharing tool running locally. Project source code: 👉 https://github.com/rogers-cyber/python-tiny-tools/tree/main/77-File-sharing-web-app Final Result Your app will include: • File upload interface • Download links • File size + upload date • Delete button • REST API for file list Step 1 — Install Dependencies First install Flask. pip install flask Flask is a lightweight Python framework perfect for building small web tools quickly. Step 2 — Create the Project File Create a file called: fileshare_pro.py Step 3 — Import Required Libraries Start by importing the modules we need. import os import uuid import hashlib from datetime import datetime And import Flask components: from flask import ( Flask , render_template_string , re