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Format a Python file with Ruff privately

Use Ruff formatting for quick Python cleanup, then run your project tests and linters before committing.

Runs in your browser

HappyFormatter tools process pasted snippets client-side for quick, privacy-first developer workflows.

No upload

HappyFormatter tools process pasted snippets client-side for quick, privacy-first developer workflows.

No account

HappyFormatter tools process pasted snippets client-side for quick, privacy-first developer workflows.

Steps

  1. 1 Paste the Python snippet into the Ruff formatter.
  2. 2 Click Format code.
  3. 3 Review indentation, imports, and string formatting.
  4. 4 Copy the result and run your local test suite.

Before

Ruff fixes indentation and spacing.

def greet(name):
 print(  f"Hello, {name}" )

Output

def greet(name):
    print(f"Hello, {name}")

After

The result is ready for local tests.

def greet(name):
    print(f"Hello, {name}")

Output

Readable Python file

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