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Python Formatter

Clean up Python indentation, collapse blank lines, normalize string quotes. Indentation cleaner, not full PEP-8.

Free No signup Client-side Privacy friendly
Indentation cleaner, not full PEP-8. For Black-compatible output, run the Black CLI locally.

How to use

  1. 1 Paste Python source code.
  2. 2 Pick indent size (2 or 4 spaces) and optional quote normalization.
  3. 3 Tune the maximum number of blank lines between blocks.
  4. 4 Copy or download the result.

Why use this tool

  • Pure client-side — your code never leaves the browser.
  • No 50 KB Black-wasm download — instant load.
  • Re-emits indents at the size you choose, even when the source mixes tabs and spaces.
  • Optional quote-style normalization that respects triple-quoted strings.

Frequently asked questions

Is this Black-compatible?

No — this is an indentation cleaner, not a full PEP-8 reformatter. It does not wrap long lines, normalize comma spacing, or rewrite expressions. For canonical formatting use the Black CLI locally.

Does it understand significant whitespace?

Yes — we detect the original indent unit (smallest non-zero leading whitespace), so re-emitting at a different size preserves block structure.

Will quote normalization break my f-strings or escapes?

Triple-quoted strings (docstrings) are kept verbatim. Short strings only swap quote style when the body has no unescaped target quote — otherwise we leave them alone.

Looking for a JavaScript formatter?

Yes — see our <a href="/javascript-formatter" class="underline">JavaScript Formatter</a> powered by Prettier.

Summary

Python Formatter is a free developer utility by Zerethon Tools. Clean up Python indentation, collapse blank lines, normalize string quotes. Indentation cleaner, not full PEP-8. Runs entirely in the browser — no signup, no upload.

Category
Developer
Pricing
Free
Privacy
Browser-based
Signup
Not required

Privacy

Your data never leaves your browser unless explicitly stated. Python Formatter runs entirely client-side — no server upload, no logging, no tracking of your input.

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