How do I format code on this page?
Paste code into the left editor or load a file, choose the options you need, and select Format. Review the result on the right, then copy or save it.
Format Python functions, classes, dictionaries, lists, and pasted snippets using familiar PEP 8 conventions. The formatter applies consistent indentation, spacing, line wrapping, and quote handling while preserving program behavior.
Load a local Python file or paste a temporary snippet, then copy or save the formatted result from the output editor.
Paste code into the left editor or load a file, choose the options you need, and select Format. Review the result on the right, then copy or save it.
The input must match the selected language or syntax. Check incomplete statements, unmatched brackets or quotes, and a dialect or mode that does not match the input, then format again.
A code formatter reads language-aware tokens and nested structures, then rewrites indentation, spacing, and line breaks according to a consistent rule set. It does not compile or run the program, so formatting is not a correctness or security check.
Python style uses 4-space indentation. The page default of 79 columns follows the conservative PEP 8 limit; a team may agree on a wider limit up to 99. Set the column limit, choose whether to keep existing string quotes, and decide whether trailing commas may expand collections and calls across multiple lines.