# Python Viewer

Free online Python viewer. Open .py source files directly in your browser without uploading them.

> Canonical page: https://elysiatools.com/en/viewers/py

- **Category:** Text Files

- **Supported formats:** .py

## Overview

This Python viewer renders source files locally in your browser. Python is a readable, general-purpose language used for scripts, data science, automation, and backends. Pick a sample or choose your own .py file to inspect functions, classes, and syntax with highlighting.

## When to use

- You have a Python file and want to read it without an editor.
- You need to inspect functions, classes, or imports quickly.
- You are on a device without a code editor and need to browse a .py file.

## How it works

- Select a built-in sample or choose your own .py file.
- The viewer renders the source with syntax highlighting in the browser, with no upload.
- Inspect the code, then switch samples or load another file any time.

## Use cases

- Reviewing functions, classes, and type hints.
- Inspecting dataclasses, decorators, and async code.
- Browsing Python code on any device.

## Samples

- **Python Comments**: Python file with hash and triple-quoted multi-line comments
- **Python Invalid Variable Names**: Python code demonstrating invalid variable names including numbers at start, special characters, and Python keywords
- **Classes & List Comprehension**: A Python example with a typed class and a list comprehension filter
- **Dataclasses & Decorators**: Python dataclasses, field defaults, and an lru_cache decorator
- **Async / Await**: Async/await with an async context manager and asyncio.gather

## Frequently asked questions

### Is this Python viewer free?

Yes. It runs in your browser for free and needs no registration or installation.

### Are my Python files uploaded?

No. Files opened from your device stay on your device. Only public sample files come from the server.

### Does it run the Python code?

No. The viewer shows the source with highlighting; it does not execute the script.

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