Lua Formatter Online

A fast online tool that formats Lua code to a consistent style, helping developers and students produce clean, legible scripts.

Tool coming soon!

We're working hard to get this tool ready for you.

Request Feature / Support

1,400+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Lua Formatter Online processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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אודות כלי זה

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.

Save your calculation history with a free account

איך להשתמש

Provide inputs: paste your Lua source and set formatting options like indent_style, indent_size, and max_line_length.
Run formatting: submit to generate formatted_code.
Review outputs: inspect formatted_code and the applied_rules summary; adjust options if needed.
Export: copy, download, or copy into your project.

Frequently Asked Questions

מצא תשובות מהירות

What Lua versions does it support?

The formatter targets Lua 5.x syntax and common Lua patterns (tables, functions, strings). It does not compile code, but it preserves semantics while applying style rules. Complex Lua-specific constructs are handled in a best-effort manner to keep readability improvements intact.

Can I preserve comments and blank lines?

Yes. The formatter provides an option to preserve_comments and a blank-line policy. When enabled, comments stay in place and blank lines are respected or normalized according to the configured max_line_length and wrapping rules.

What if the input has syntax errors?

If parsing fails, the tool performs a best-effort reflow and returns an error flag along with a diff. Formatted_code may include conservative wrapping to avoid altering semantics, but some structural correctness may be unguaranteed.

Is the formatter deterministic?

Yes. With identical inputs and identical options, repeated formatting yields the same result. This supports stable code reviews and reproducible formatting across commits and CI runs.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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