Type values in the input box, one per line. Each call to io.read() returns the next line.

No. Your code runs in your browser. Only the runtime is downloaded from jsDelivr on first use.

Online Lua Compiler

Run Lua 5.4 code online in your browser. Standard libraries, io.read input and instant output. Free, no sign-up, nothing uploaded.

Lua

Ctrl/⌘ + Enter to run

main.lua

No output yet. Press Run to see results here.

Lua

Code runs locally in your browser; it is not uploaded.

Tool page updated: 2026-10-22