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indent · whitespace · structure

Python Formatter

Paste ragged Python. Get back clean, consistently indented code — tabs and spaces untangled, trailing whitespace gone, blank-line clutter collapsed. Nothing inside your strings ever gets touched.

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Python Formatter

Python Formatter rebuilds indentation from scratch using indent-stack logic — the same approach Python's tokenizer uses for block structure.

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About Python Formatter

Python Formatter rebuilds indentation from scratch using indent-stack logic — the same approach Python's tokenizer uses for block structure.

Paste ragged Python and get back clean, consistently indented code: tabs converted to spaces, trailing whitespace removed, and blank-line clutter collapsed. String and comment contents are never modified. Everything runs locally in your browser.

How to use Python Formatter

  1. Paste Python code or upload a .py file.
  2. Choose indent width (2, 4, or 8 spaces).
  3. Click Format code — or enable auto-format as you type.
  4. Copy or download formatted output from the right panel.

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Frequently asked questions

Does this replace black or ruff?
No — it reformats whitespace and indentation only. For import sorting, line wrapping, and style rules use black, ruff, or autopep8 in CI.
Is my code uploaded?
No. Formatting happens entirely in your browser.
Are multiline strings changed?
No. Lines inside triple-quoted strings and unterminated strings are left byte-for-byte untouched.
Can it fix syntax errors?
It reformats whitespace, not logic. Invalid Python may still format partially, with warnings for unclosed strings or brackets.
Does it sort imports or wrap long lines?
No. It focuses on indentation, tabs/spaces, trailing whitespace, and blank-line cleanup.