Lua 5.3.6

Online Lua Compiler & Editor

Name: myCompiler Lua
Author: myCompiler

myCompiler is a free online Lua compiler, editor and code runner that lets you write, run, and share Lua code directly in your browser. It works as your Lua playground, sandbox, fiddle, cloud compiler, and online REPL. No downloads, no installation needed. Just open the editor and start coding with syntax highlighting, autocomplete, and instant output.

Start coding in Lua How it works

27+ languages Used by 1M+ developers Free forever

main.lua

local fruits = {"apple", "banana", "cherry", "date"}

for i, fruit in ipairs(fruits) do
    print(i .. ". " .. fruit:upper())
end

print("\nTotal: " .. #fruits .. " fruits")

Output

1. APPLE 2. BANANA 3. CHERRY 4. DATE Total: 4 fruits

How to run Lua code online

Three steps to go from idea to running Lua code in this online playground. No account required.

Write your code

Open the Lua editor and start writing. The smart editor gives you syntax highlighting, autocomplete, and error detection as you type.

Click Run

Hit the Run button or press +Enter to run your Lua code on secure, sandboxed cloud servers.

See results

Output appears instantly in the integrated terminal. Errors and exceptions show up with clear, helpful messages.

Everything you need to code in Lua

A complete online Lua IDE and coding playground in your browser. Write, run, and share code without any setup.

Zero setup required

Start coding in seconds with this browser-based Lua interpreter. No downloads, no installations, no environment configuration. Open your browser, go to myCompiler, and start writing Lua code immediately.

Works on any device with a web browser. Desktop, laptop, tablet, phone, Chromebook. There is nothing to install and nothing to configure.

Feature-rich code editor

Write Lua with a professional-grade code editor built into your browser. Syntax highlighting colors your code for readability, making keywords, strings, and functions easy to distinguish at a glance.

Intelligent autocomplete suggests methods and properties as you type, and real-time error detection catches mistakes before you run your code.

Multi-file projects

Create and manage multiple files in a single project. Use the file sidebar to organize your code into modules, then import them across files just like in a desktop IDE.

Build modular applications with proper project structure. Each file is editable, and you can switch between them instantly.

Run code instantly

Click the Run button or press +Enter to execute your Lua code instantly. This online code runner displays output immediately in the integrated terminal panel. Your code runs on secure, sandboxed cloud servers and results appear in seconds.

Error messages and tracebacks are displayed clearly, making it easy to find and fix issues. The terminal supports ANSI colors for rich output formatting.

Ready to try it? Write and run your first Lua program in seconds.

Open Lua editor

Lua on myCompiler

myCompiler runs Lua 5.3.6, always up to date with the latest stable release. You get a full browser-based IDE with syntax highlighting, intelligent code completion, multi-file project support, a built-in terminal for real-time output, and standard input (stdin) for interactive programs. Write, compile, run, and debug Lua code on any device. Desktop, laptop, tablet, phone, Chromebook. Zero downloads, zero configuration, and no sign-up required. Save your programs with a unique URL and share them with anyone. You can also embed a working Lua editor on your own website.

Use this online Lua playground as a quick code executor for testing snippets, a coding sandbox for learning, or a cloud compiler for coding interview preparation. The editor includes dark mode for comfortable coding, keyboard shortcuts for faster workflows, and clear error messages with line numbers so you can debug quickly. Students use it for homework and practice. Teachers use it to share working examples. Developers use it to prototype ideas. myCompiler is beginner-friendly, fast, and completely free. It works in any modern web browser.

Start coding in Lua

Lua code examples

Common Lua patterns you can try in the online compiler. Each example is ready to run.

Hello World in Lua

main.lua

print("Hello, World!")

Variables and Data Types in Lua

main.lua

local name = "Alice"
local age = 30
local height = 5.6
local isStudent = true
print(name .. " is " .. age .. " years old")

If-Else Conditionals in Lua

main.lua

local x = 10
if x > 0 then
    print("Positive")
elseif x == 0 then
    print("Zero")
else
    print("Negative")
end

For and While Loops in Lua

main.lua

for i = 1, 5 do
    print("Count: " .. i)
end

local fruits = {"apple", "banana", "cherry"}
for _, fruit in ipairs(fruits) do
    print(fruit)
end

Functions in Lua

main.lua

local function greet(name, greeting)
    greeting = greeting or "Hello"
    return greeting .. ", " .. name .. "!"
end

print(greet("Alice"))
print(greet("Bob", "Hi"))

Arrays and Collections in Lua

main.lua

-- Array-like table
local fruits = {"apple", "banana", "cherry"}
table.insert(fruits, "date")
print(fruits[2])

-- Dictionary-like table
local person = {name = "Alice", age = 30}
print(person.name)

Metatables in Lua

main.lua

local Dog = {}
Dog.__index = Dog

function Dog.new(name, breed)
    return setmetatable({name=name, breed=breed}, Dog)
end

function Dog:bark()
    return self.name .. " says Woof!"
end

local dog = Dog.new("Rex", "Labrador")
print(dog:bark())

Error Handling in Lua

main.lua

local ok, err = pcall(function()
    error("something went wrong")
end)

if not ok then
    print("Caught: " .. err)
end

local result, msg = xpcall(
    function() return 1 / 0 end,
    function(e) return "Handler: " .. e end
)
print(result, msg)

File I/O in Lua

main.lua

-- Write to file
local f = io.open("output.txt", "w")
f:write("Hello, File!\n")
f:close()

-- Read from file
local f2 = io.open("output.txt", "r")
local content = f2:read("*all")
f2:close()
print(content)

Tables in Lua

main.lua

-- Tables as flexible data structures
local scores = {Alice=95, Bob=87, Charlie=92}

-- Iterate over key-value pairs
for name, score in pairs(scores) do
    print(name .. ": " .. score)
end

-- Table as a stack
local stack = {}
table.insert(stack, 10)
table.insert(stack, 20)
print("Top: " .. table.remove(stack))

Try these examples in the editor

How to take input in Lua online

myCompiler supports standard input (stdin) for Lua programs. Use Lua's standard input functions to read user input. Enter your input data in the stdin panel before running your program.

This works for both single-line and multi-line input. You can read strings and convert to numbers using the language's built-in I/O functions.

Try it yourself

main.lua stdin supported

local name = io.read()
local age = tonumber(io.read())

print("Hello " .. name .. "!")
print("You'll be " .. (age + 1) .. " next year.")

stdin

Alice
25

Output

Hello Alice!
You'll be 26 next year.

No setup, no sign-up. Start writing Lua code right now.

Start coding now

Getting started with Lua online

You can start writing and running Lua code right now without installing anything. Type your code, and click Run. This free Lua code runner executes your program instantly and displays the output in the terminal panel below the editor. Open the Lua online editor, type your code, and click Run.

If you're new to Lua, use this online Lua playground to start with the basics like variables, data types, conditionals, and loops. The code examples above cover all the fundamentals you need to get started. Each example can be copied into the sandbox and run immediately. No setup, no configuration.

As you progress, try creating multi-file projects, using libraries, and sharing your programs with others via URL. Sign up for a free account to save your work and build a personal library of programs. myCompiler works as a full online Lua IDE right in your browser.

Who uses myCompiler

Whether you're learning to code, preparing for interviews, or prototyping ideas, myCompiler is built for you.

Students & Learners

Practice exercises, complete homework assignments, and experiment with code without installing anything on school or personal computers.

Teachers & Educators

Share code examples with students via unique URLs. Embed the compiler in course materials so students can run examples directly in the browser.

Interview Candidates

Practice coding interview problems, test algorithms, and verify solutions quickly during preparation for technical interviews.

Professional Developers

Quickly prototype ideas, test code snippets, or try out a library without setting up a local environment. Great for quick experiments.

Content Creators & Bloggers

Embed interactive examples in blog posts, tutorials, and documentation so readers can run code without leaving the page.

Teams & Collaborators

Share code snippets with colleagues via URLs. Others can view, run, and fork your code to build on your work.

myCompiler vs. local IDE

Why use an online Lua compiler instead of installing one locally?

Feature	myCompiler	Local IDE
Setup time	Instant	Minutes to hours
Installation	None required	Lua + IDE required
Device support	Any browser	Desktop only
Sharing code	One-click URL	Manual (file, git, etc.)
Languages	27+ in one place	One at a time
Cost	Free forever	Free to $$$
Works on Chromebook	Yes	Limited

What is Lua?

Lua is a lightweight, fast, embeddable scripting language designed in Brazil by Roberto Ierusalimschy, Waldemar Celes, and Luiz Henrique de Figueiredo at PUC-Rio University. First released in 1993, Lua was designed to be small, portable, and easily embedded into host applications, its entire runtime fits in under 300KB of compiled code.

Lua uses a single, flexible data structure, the table, to represent arrays, dictionaries, objects, and modules. This simplicity, combined with first-class functions, closures, coroutines, and metatables for operator overloading, makes Lua surprisingly powerful despite its small footprint. Lua is the most widely used embedded scripting language in the world.

What is Lua used for?

Lua is used as an embedded scripting language in game engines, Roblox's entire game logic is written in Lua, and World of Warcraft, Garry's Mod, and Defold use Lua for game scripting. It powers configuration and plugin systems in applications like Neovim, Redis (Lua scripting), Nginx (OpenResty), and Wireshark. Lua is also used in IoT firmware (NodeMCU for ESP8266) and embedded systems where memory footprint is critical.

Lua for beginners

Lua is a clean, minimal language that is easy to learn. Its small standard library and simple syntax mean fewer things to memorize. Lua's 1-based array indexing can surprise programmers used to other languages, but the language overall is very approachable. If you want to write Roblox games or mod games like World of Warcraft, learning Lua is the direct path. Use myCompiler's online Lua compiler to practice without any local setup.

Lua vs other languages

Compared to Python, Lua is significantly more lightweight and faster to embed in applications, but Python has a far larger ecosystem for standalone development. Compared to JavaScript, Lua is simpler and leaner but less ubiquitous. Compared to other embeddable languages like TCL or Guile, Lua has won the game development market by offering the best balance of simplicity, speed, and integration ease.

Why use an online Lua compiler?

An online Lua compiler, also called a Lua playground or Lua sandbox, lets you run Lua code directly in your browser without installing Lua locally. This is useful for learning Lua's table-based data model, practicing metatables and object-oriented patterns, experimenting with coroutines, and prototyping game logic or configuration scripts without any local setup.

myCompiler's online Lua IDE supports the full Lua standard library including table, string, math, io, and os modules. Coroutines, metatables, and all Lua 5.x features work out of the box. Save and share programs, all free.

Why is Lua so popular?

Lua's popularity is driven by its dominance in game scripting. Roblox alone has millions of developers writing Lua, making it one of the most actively used languages among young developers. Its extremely small footprint and C API for embedding make it the go-to choice for applications needing user-extensible scripting. Redis, Nginx/OpenResty, and Neovim all chose Lua as their scripting language for these reasons.

Lua career opportunities

Lua knowledge is valuable for game developer (especially Roblox), game systems programmer, embedded systems engineer, and platform/tool developer roles at game studios. Neovim's Lua-based configuration has also created a niche for Lua in the developer tools space. For Roblox game development in particular, Lua (via Luau, Roblox's extended Lua dialect) is the primary career skill.

Try Lua online Free · No sign-up needed

Keyboard shortcuts

Code faster with these keyboard shortcuts in the myCompiler editor.

Run code

+ Enter

Save program

+ S

Toggle comment

+ /

Indent line

Tab

Unindent line

Shift + Tab

Undo

+ Z

Select next occurrence

+ D

Find & replace

+ H

Embed the Lua compiler on your website

Add an interactive Lua compiler to your website, blog, or learning platform. Readers can write and run Lua code directly on your page without leaving it.

Perfect for technical tutorials, coding courses, documentation, and educational content. Save a program on myCompiler and use the embed link to add it to any webpage.

Embedded Lua compiler, editor and code runner

HTML

<iframe
src="https://www.mycompiler.io
    /embed/lua"
width="100%"
height="400"
frameborder="0">
</iframe>

Why developers choose myCompiler

A full-featured online IDE for Lua and 27+ other programming languages.

27+ Languages

Python, JavaScript, Java, C++, Rust, Go, TypeScript, C#, and many more. All compilers and interpreters in one place. Switch languages instantly.

Dark & Light Mode

Switch between light and dark themes with one click. Code comfortably in any lighting condition, day or night.

Mobile Friendly

Fully responsive editor optimized for phones, tablets, and Chromebooks. Code on any device with a web browser. No app download needed.

Save & Share Code

Save programs to your account, share via unique URLs, and let others view, fork, and run your code. Great for collaboration and code reviews.

Tags & Organization

Organize your saved programs with tags and find them quickly with search and filters. Build a personal library of code snippets and solutions.

No Account Required

Start writing and running code immediately. No sign-up, no email, no credit card. Create a free account later only if you want to save your work.

Explore more programming languages

myCompiler supports 27+ languages. Switch between them anytime. All free, all in one place.

View all 27+ languages

Frequently asked questions

Common questions about using the online Lua compiler, playground, and code runner.

Yes! myCompiler is completely free for all supported languages including Lua. There are no subscriptions, no premium tiers, and no hidden costs. Every feature is available at no charge.

myCompiler keeps its Lua environment up to date. You can see the exact version on the language details section of this page. We regularly update all language runtimes to their latest stable versions.

Lua tables are the primary data structure and work as arrays, dictionaries, and objects. On myCompiler, you can use all Lua table features including metatables, metamethods, and the table standard library.

Simply open the Lua editor, write or paste your code, and click the Run button. Your code will be executed on our servers and the output will appear in the terminal panel within seconds.

Yes. Click Save to store your program. You will receive a unique URL that you can share with anyone. Recipients can view, fork, and run your code.

Yes. myCompiler supports multi-file projects. You can create, rename, and delete files in the sidebar. This lets you organize your Lua code just like in a local IDE.

Yes. All code runs in isolated containers on our servers. Each execution gets its own sandboxed environment that is destroyed after completion. Your code cannot affect other users or our infrastructure.

Yes. myCompiler has a responsive design optimized for phones and tablets. You can write and run Lua code on the go. The mobile interface uses tabs for switching between the editor, output, and file panels.

Yes. Click the Input tab in the bottom panel, type or paste your input data, then click Run. Your program will read from the input you provided.

Execution is fast. Code runs on our optimized cloud infrastructure and output typically appears within seconds. Execution time depends on the complexity of your program.

Yes. myCompiler provides an embed feature. You can copy an iframe snippet and paste it into your website, blog, or documentation. Visitors can edit and run code directly on your page.

myCompiler supports common editor shortcuts including Run (Ctrl/Cmd+Enter), Save (Ctrl/Cmd+S), Find (Ctrl/Cmd+F), and more. See the keyboard shortcuts section on this page for the full list.

No. myCompiler requires an internet connection because code is compiled and executed on our cloud servers. The editor itself loads in your browser, but running code requires connectivity.

myCompiler offers a fast, free, zero-setup environment with a modern code editor, multi-file support, dark mode, and instant sharing. It is ideal for learning, prototyping, interviews, and sharing code examples.

Yes. myCompiler is great for practicing algorithms and coding problems. You can write Lua code, provide custom input, and test your solutions instantly. Save your work and come back to it anytime.

Use print statements or console output to trace your program's behavior. myCompiler shows all standard output and error messages in the terminal panel. Error messages include line numbers to help you locate issues.

Ready to write Lua code?

Open the free Lua playground and start coding immediately. No downloads, no account required.

Start coding in Lua

Free · No sign-up required · Lua 5.3.6