json.lua
A lightweight JSON library for Lua
...The library exposes a simple API for turning Lua values into JSON strings and parsing JSON strings back into Lua values. Its small size makes it practical for games, plugins, scripts, embedded Lua environments, and projects where dependency weight matters. It is implemented in pure Lua and is known for being fast among pure Lua JSON options while still offering useful error messages. Overall, it is a convenient choice when a Lua project needs dependable JSON support with minimal setup.