Douglas Crockford
American programmer best known for specifying and popularizing JSON, writing JavaScript: The Good Parts, and building JSLint — a long-running advocate for minimalist, defensive JavaScript style.
Douglas Crockford is an American software engineer whose career has centered on JavaScript and on stripping languages down to their defensible subsets. While at State Software in the early 2000s, he and Chip Morningstar exchanged what Crockford later identified as the first JSON message in April 2001; in 2002 he registered json.org and published a short specification of the format. He has consistently framed JSON as something he discovered in JavaScript's object-literal syntax rather than invented. Beyond JSON he wrote JSLint (a static analyzer that pioneered the 'good parts' framing for JavaScript), authored the influential 2008 book JavaScript: The Good Parts, designed the JSON-friendly ADsafe subset, and worked at Yahoo and PayPal. He proposed JSON's standardization through ECMA, leading to ECMA-404 in 2013. Crockford's contributions sit at the intersection of language design taste and pragmatic interop: he argues repeatedly that constraint and removal — not addition — are where most language and protocol value comes from.