Introduction JSON (Javascript Object Notation) is a popular data-interchange format and supported by a lot of script languages. On AutoIt, there is already a >JSON UDF written by Gabriel Boehme. It is good but too slow, and not supports unicode and control characters very well. So I write a new one (and of course, fast one as usual). I use a machine code version of JSON parser called "jsmn". jsmn not only supports standard JSON, but also accepts some non-strict JSON string. See below for