Learn how to create a web application using Flask’s simple yet powerful framework. This guide shows you how to publish a Python web app with automatic scaling.

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What you’ll learn

Flask

Build Python web apps

Autoscaling

Publish with automatic scaling

Web Development

Create dynamic web pages

Deployment

Host your application

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Create your app

1

Fork the template

VSign in to Replit and fork the Flask template. Select + Use Template and follow the prompts to create your Replit App.
Flask’s development server automatically reloads when you make changes to your code.
2

Set up publishing

  1. Select Publish in the workspace header
  2. Choose Autoscale deployment
  3. Configure your app:
    • Machine: 1vCPU, 2 GiB RAM (default)
    • Max machines: 3 (default)
    • Run command: python3 main.py
Autoscale deployments automatically adjust resources based on website traffic.
3

Launch

Select Publish to launch your website. It will be live in a few minutes!

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Customization options

Routes

  • Add new pages
  • Handle form submissions
  • Create API endpoints

Templates

  • Design page layouts
  • Add dynamic content
  • Style your pages

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Next steps

Databases

Add data persistence

Custom Domain

Add your own domain

Create a FastAPI service

Build with FastAPI

Build with AI

Create apps using Agent
Want to learn more about web development? Check out our publishing documentation.