It doesn't seem to have much in the way of validation, e.g., it will indiscriminately let you use either ']' or '}' to terminate an object or array. Also, it's more lenient than RFC or json.org JSON in allowing '\v' for whitespace. I'd treat it more as a "data extractor for known-correct JSON". But even then, rolling your own string or number parser could get annoying, unless the producer agrees on a subset of JSON syntax.