Joe Tsai, Daniel Martí, Johan Brandhorst-Satzkorn, Roger Peppe, Chris Hines, and Damien Neil 9 September 2025 Introduction JavaScript Object Notation (JSON) is a simple data interchange format. Almost 15 years ago, we wrote about support for JSON in Go, which introduced the ability to serialize and deserialize Go types to and from JSON data. Since then, JSON has become the most popular data format used on the Internet. It is widely read and written by Go programs, and encoding/json now ranks as...