Format C# with a CSharpier-compatible Roslyn engine running in the browser.
Runs in your browserDeveloper
Category: Developer
Python Formatter
Format Python with Ruff and configure line length, quotes and trailing commas.
Runs in your browserProcessed locally. Your input never leaves your device.
Details
About this tool
Paste Python code and format it with Ruff's syntax-aware formatter. Set the preferred line length, indentation, quote style and magic trailing-comma behaviour.
Python indentation is part of the language, so this tool uses a real Python parser rather than generic whitespace rules. Invalid syntax is rejected and valid blocks, comprehensions, calls and strings are printed consistently.
Ruff runs as WebAssembly in a dedicated browser worker. The code stays on the device and the formatter is loaded only when this page is used.
Keep going
Related tools
-
-
Format and beautify JavaScript with configurable indentation, quotes and semicolons.
Runs in your browserDeveloper -
Format YAML configuration with syntax checking, indentation and line wrapping.
Runs in your browserDeveloper
Good to know
Questions people actually ask
- Is this a real Python parser?
- Yes. The tool uses Ruff compiled to WebAssembly, not regular expressions or a generic indentation algorithm.
- Is the source code uploaded?
- No. Parsing and formatting run in the browser. The language engine is loaded on demand and the source stays on the device.
- Can formatting change program behaviour?
- The formatter is designed to preserve the parsed program while normalising line length, quotes and trailing commas. Review a diff before committing, especially when a repository enforces different style rules.