Luau Formatter

Format and beautify Luau code for Roblox with type annotations and full syntax support

Luau Input

Formatted Output

Luau Formatting Tips

Use tabs for indentation, as recommended by the official Roblox Lua Style Guide that StyLua follows.
Annotate function signatures with Luau types — the formatter keeps them aligned and readable.
Prefer compound assignments (+=, -=, ..=) and string interpolation (`hello {name}`) for cleaner Luau code.
Working with plain Lua (5.1-5.4) instead? Our Lua Formatter handles standard Lua scripts. Lua Formatter →

Professional Luau Processing Features

Everything you need to work with Luau data efficiently and professionally

Luau Syntax Aware

Understands all Luau syntax: type annotations, generics, type aliases, compound assignments, and string interpolation.

Roblox Style Guide

Follows the official Roblox Lua Style Guide with tab indentation, matching the conventions of Roblox Studio.

Type Annotation Support

Formats type annotations, function signatures, and table types with clean, consistent alignment.

StyLua Engine

Built on StyLua, the battle-tested formatter used by professional Roblox teams and open-source projects.

Fast WASM Processing

Formats Luau files up to 10MB instantly with client-side WebAssembly, no server round-trips needed.

Deterministic Output

Produces the same clean output every time, so your whole team gets consistent formatting.

How It Works

Simple steps to process your Luau like a pro

Paste Your Luau Code

Paste your Roblox Luau script into the input area, or load a sample to get started.

Format Instantly

Click the format button and StyLua beautifies your code following the Roblox style guide.

Review the Output

Check the formatted result with clean indentation, aligned types, and consistent spacing.

Copy or Download

Copy the formatted Luau code back into Roblox Studio or your favorite editor.

Professional Luau Formatter & Validator

Trusted by millions of developers worldwide for reliable Luau processing

Built by Experts

Our Luau formatter is built on StyLua, the same engine used by professional Roblox developers. It follows the official Roblox Lua Style Guide and understands every Luau feature, from type annotations to string interpolation.

Key Technical Features:

• Powered by StyLua, the formatter trusted by the Roblox community
• Full Luau syntax support including type annotations and generics
• Handles compound assignments and string interpolation correctly
• Client-side processing for maximum security and speed
• Support for large scripts up to 10MB

Trusted & Secure

Trusted by Roblox game developers and scripters worldwide. Your Luau scripts are formatted entirely in your browser and never leave your device.

Security & Privacy:

• 100% client-side processing - data never sent to servers
• No tracking, cookies or data collection
• HTTPS encryption for secure connections
• No data stored or cached after processing
• GDPR and CCPA compliant approach

Why Professionals Choose EZ Formatter

99.9%

Uptime Reliability

<100ms

Average Processing Time

10M+

Luau Files Processed Monthly

Join millions of developers who trust our Luau formatter for their daily development workflow. No registration required, completely free, and built with privacy in mind.

Frequently Asked Questions

Common questions about Luau Formatter formatting answered

Yes, our Luau formatter is completely free with no registration required. All formatting happens in your browser using WebAssembly.

Yes, it fully supports Luau type annotations, type aliases, generics, and exported types. Types are preserved and cleanly aligned in the output.

Absolutely. It is designed for Roblox development and follows the official Roblox Lua Style Guide, using tab indentation like Roblox Studio.

No. The formatter only adjusts whitespace, indentation, and line breaks. It never modifies identifiers, values, types, or logic.

Yes, Luau-specific syntax like backtick string interpolation (`hello {name}`) and compound assignments (+=, -=, ..=) is fully supported.