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Flask

Deploy Flask on Render with this quickstart template. Get your Python web app live in minutes with automatic deploys and free SSL.

Why deploy Flask on Render?

Flask is a lightweight Python web framework for building web applications and APIs. It provides the essentials—routing, request handling, and templating—without enforcing a specific project structure, giving developers flexibility to add only the components they need.

This template gives you a production-ready Flask application with the web service already configured—no need to set up your own WSGI server, figure out the right Python buildpack, or manually configure environment variables. One click gets you a live URL with automatic deploys from your repo, so every git push updates your app without touching a CI/CD pipeline. You skip the typical Flask deployment dance of configuring Gunicorn, setting up reverse proxies, and debugging production settings that work differently from your local flask run.

What you can build

After deploying, you'll have a minimal Flask web server running and publicly accessible via HTTPS. This gives you a working Python backend you can immediately start extending with your own routes and logic—useful if you want to skip boilerplate setup and get straight to building.

Key features

  • Minimal Flask Setup: Provides a bare-bones Flask application structure based on the official quickstart guide.
  • Render Deployment Ready: Pre-configured for one-click deployment to Render's hosting platform.
  • Python Web Framework: Uses Flask as a lightweight WSGI web application framework for building web services.
  • Live Demo Available: Includes a working deployed example at flask.onrender.com for reference.

Use cases

  • Backend developer deploying a simple Python API to Render
  • Student learning Flask basics with a minimal hosted example
  • Startup founder prototyping a lightweight web service quickly
  • Developer testing Render deployment workflow with a simple app

Next steps

  1. Open your Flask service URL in a browser — You should see 'Hello, World!' or the default Flask welcome message displayed on the page
  2. Test the response time by refreshing the page several times — You should see the page load consistently within 1-2 seconds without errors
  3. Configure a custom route by editing app.py and pushing to your repo — You should see Render automatically redeploy and your new route accessible within a few minutes

Resources

Stack

flask
python
gunicorn

Tags

web service
web framework
backend