json¶

json is a built-in module that exposes JSON encode and decode helpers.

Load it with:

local json = require("json")

Functions¶

• json.encode(value, pretty): encodes a Lua value as JSON. Set pretty = true for indented output.
• json.decode(text): decodes JSON into Lua tables and scalar values.

Lua tables are encoded as arrays when they use contiguous integer keys starting at 1; otherwise string and numeric keys become JSON object keys. nil, booleans, numbers, strings, arrays, and object-like tables are supported.

local payload = json.decode('{"answer":"ok"}')
print(json.encode({ answer = payload.answer }))