Lua Formatter Online

Lua Formatter Online formats Lua source code by applying a controlled set of formatting rules. It accepts Lua code, user options, and returns a standardized version with uniform indentation, line breaks, and whitespace. The tool targets teams maintaining Lua modules for publication, teaching materials, or shared libraries, delivering consistent style across contributors.

Conceptually, the tool operates in passes: it tokenizes the input, builds a lightweight AST, and re-emits code with the selected style. It preserves comments and string literals, avoids semantic changes, and wraps long expressions according to max_line_length. Indentation uses spaces or tabs per settings; table constructors and function calls are formatted to improve readability.

Core value comes from repeatable, auditable formatting. Users gain faster code reviews, reduced drift from style guidelines, and easier onboarding for new contributors. Core features include options for indentation, line length, and comment handling, plus a diagnostic of rules applied and a diff summary.

Use cases include preparing Lua modules for publication, formatting teaching examples, or standardizing scripts across a repository. The tool is designed to be deterministic, so re-formatting the same input with identical options yields the same result, enabling reliable code review and version control.