I will add that as a library, it has a big potential to be used in resource restricted envs, such as microcontrollers. Every other JSON library under the sun uses HashMaps or Btrees to structure the tree which end up wasting space. Another interesting one called Araq/packedjson whose ideas I borrowed, might be the most space efficient design so far, however it looses on speed comparisons on operations that involve removing items. That's because some structure should be maintained and this library provides the best trade-off between complexity and space efficiency.