Online Lua Compiler & Algorithm Visualizer – Run Lua Online (5.4)
Write, compile, and run Lua code instantly in your browser. This free online Lua compiler needs no installation or signup — just type your Lua program, click Run, and see the output. Supports stdin, multi‑file projects, shareable snippet URLs, and AI help to generate, fix, and explain Lua code.
About Online Compiler
Our free online compiler lets you write, compile, and run code instantly in your browser. Supports Python, Java, C++, JavaScript, Go, Rust, and many more languages. No installation required.
Compare Languages Side by Side
Want to see how Lua stacks up against another language? Open the Code Playground to run Lua next to Python, Go, Rust, or any language — each pane picks its own language and version, and you run them together.
Supported Languages
Popular: Python, Java, C++, C, JavaScript, TypeScript, Go, Rust
Web: PHP, Ruby, Node.js, HTML/CSS
Systems: C, C++, Rust, Go, Swift
Functional: Haskell, Scala, Kotlin, F#, Clojure
Features
- Monaco Editor (VS Code) with syntax highlighting
- Real-time code execution with output streaming
- Custom compiler flags support (-O2, -Wall, etc.)
- Share code via unique snippet URLs
- Keyboard shortcuts (Ctrl+Enter to run)
Run & Visualize Lua Online (5.4)
Write and run Lua 5.4 code online. Plus a built‑in algorithm visualizer: click Visualize to watch your code run line by line as tables animate — arrays, 2D matrices, and hash maps update step by step, with a call‑stack view for recursion. Your script runs unchanged; the visualizer observes it through Lua's debug hooks. Ideal for learning sorting, binary search, recursion, and frequency counting. Multi‑file and shareable snippet URLs supported.
FAQ
Does the online Lua compiler include an algorithm visualizer? Yes. Click Visualize to step through your code while tables animate — arrays, 2D matrices, and maps update, the current line is highlighted, and the call stack tracks recursion. Your code runs unchanged; nothing to import.
Which data structures can I visualize? Lua tables: dense integer‑keyed tables render as arrays (1‑based), nested tables as 2D matrices, and string/sparse‑keyed tables as hash maps. Great for sorting, binary search, recursion, and frequency counts.
Which Lua version is available? Lua 5.4.
Multi‑file? Yes, add additional .lua files.
How do I share? Click Share to generate a URL.
How to Use Online Compiler
Choose from 60+ programming languages including Python, Java, C++, JavaScript, Go, Rust, and more.
Use our Monaco editor (same as VS Code) with syntax highlighting, auto-completion, and error detection.
Click Run or press Ctrl+Enter. Your code executes in a secure sandbox and output appears instantly.
Share your code via unique URL or embed interactive code snippets in your blog, book, or documentation.
For Authors, Educators & Technical Writers
Perfect for programming books, online tutorials, technical documentation, and educational content. Embed interactive, runnable code examples directly in your content.
Click Embed button above to generate embed code for your content!
Example: Hello World in Lua
local function greet(name)
return "Hello, " .. name .. "!"
end
print(greet("World"))Copy this Lua snippet into the editor above and click Run to execute it instantly — no setup required.
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Jump straight to a language-specific page:
Need embeds? See Embed Online Compiler.