Typer, the FastAPI of CLI Apps

In plain words

Typer is a framework for building command-line interface applications using Python. It automatically generates CLI apps from Python functions and type hints, reducing boilerplate code. Developers can create fully-featured command-line tools with automatic help text, argument parsing, and parameter validation. The framework is designed to make CLI development faster and more straightforward for Python developers of any skill level.

written from the facts on this page · September 2026

From the sources

Typer, build great CLIs. Easy to code. Based on Python type hints. Typer is a library for building CLI applications that users will love using and developers will love creating . Based on Python type hints. It's also a command line tool to run scripts, automatically converting them to CLI applications. Typer is FastAPI 's little sibling, it's the FastAPI of CLIs. $ uv add typer ---> 100% This installs both the Typer library and the typer command in the project's virtual environment. To use typer directly with shell completion, activate the project environment and install completion . If you prefer to use pip , install typer inside a virtual environment. See the installation guide for the…from typer.tiangolo.com

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