lunajson

Lunajson features SAX-style JSON parser and simple JSON decoder/encoder. It is tested on Lua 5.1, Lua 5.2, Lua 5.3, Lua 5.4, and LuaJIT 2.0. It is written only in pure Lua and has no dependencies. Even so, decoding speed matches lpeg-based JSON implementations because it is carefully optimized. The parser and decoder reject input that is not conformant to the JSON specification (ECMA-404), and the encoder always yields conformant output. The parser and decoder also handle UTF/Unicode surrogate pairs correctly.