Private / No Upload

Ruff vs Black for Python formatting

Ruff and Black both produce consistent Python style. Ruff is usually chosen when teams want one fast tool for linting and formatting, while Black remains the familiar dedicated formatter.

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.

Key differences

Ruff focuses on speed and an integrated Python toolchain.

Black focuses on stable, opinionated formatting with broad ecosystem adoption.

Both are formatter choices; neither replaces type checking or tests.

Messy function

A browser Ruff formatter fixes indentation and spacing without uploading code.

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

Output

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

Related pages