How to Install Flask on Windows 11 (Beginner-Friendly Step-by-Step Guide)

Flask is a lightweight and flexible Python web framework that's perfect for beginners. In this step-by-step tutorial, you'll learn how to install Flask on Windows 11, set up a virtual environment, and confirm your installation successfully.

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1. Check Your Python Version

Before installing Flask, make sure Python is installed on your system. Run this command in Command Prompt (CMD):

C:\> python --version

If you don't have Python installed, download it from the official Python website.

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2. Create Your Application Directory

Create a new folder where your Flask project will live:

C:\> mkdir myapp

Then move into that directory:

C:\> cd myapp

Your path should now look like this:

C:\myapp>

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3. Set Up a Virtual Environment

Create a virtual environment inside your project folder. This keeps your project dependencies isolated:

C:\myapp> py -3 -m venv .venv

Activate your virtual environment:

C:\myapp> .venv\Scripts\activate

You should now see (venv) at the start of your command line:

(venv) C:\myapp>

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4. Install Flask Framework

With your virtual environment activated, install Flask using pip:

(venv) C:\myapp> pip install Flask

This will download and install the latest version of Flask and its dependencies.

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5. Verify Flask Installation

After installation, confirm that Flask is installed correctly:

(venv) C:\myapp> flask --version

You can also check details using:

(venv) C:\myapp> pip show Flask

Or verify it inside Python:

(venv) C:\myapp> python
>>> import importlib
>>> importlib.metadata.version('flask')

If Flask's version number appears, your installation is successful!

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Congratulations! You've successfully installed Flask on Windows 11. You can now start building your first Flask app.