Tomorrow’s Tech Treepowered by Astra

File Formats & Standards · Recorded milestone

JSON data format

Recorded year2001

Douglas Crockford and Chip Morningstar send the first JSON message, a light text format from JavaScript that becomes the language of web APIs.

Explore this milestone on the interactive map

Built on

Led to

Sources & evidence

Dataset updated 2026-10-18. This individual record has not been separately re-reviewed.