Python Code Formatter & Beautifier
Format and beautify Python code with indentation normalization, import sorting, quote fixes, and PEP 8 tips. Everything runs in your browser — your code stays private.
About This Python Formatter
This client-side Python formatter handles the most common formatting tasks you encounter when writing or reviewing Python code. It normalizes indentation, sorts and groups imports according to PEP 8, cleans up trailing whitespace, normalizes string quotes, and ensures proper blank lines between top-level definitions.
What It Does
- Indentation normalization — converts tabs or inconsistent spacing to 2 or 4 spaces
- Import sorting — groups stdlib, third-party, and local imports with alphabetical ordering
- Quote normalization — converts single-line strings to your preferred quote style, preserving triple-quoted strings
- Trailing whitespace removal — strips invisible whitespace at the end of every line
- Blank line normalization — two blank lines before top-level functions/classes, one before methods
- Trailing commas — optionally adds trailing commas in multi-line data structures
- PEP 8 tips — actionable suggestions for long lines, missing docstrings, naming, and comparison style
- Syntax highlighting — color-coded output for keywords, strings, comments, numbers, and decorators
Limitations
Since this runs entirely in your browser without a Python AST parser, it cannot perform AST-level transformations like Black or autopep8. It won't reflow long expressions or restructure complex comprehensions. For full-fidelity formatting, use black, autopep8, or yapf locally. This tool is excellent for quick formatting, learning PEP 8, and cleaning up code snippets.