Why Use Go Structs for JSON?

Go's encoding/json package uses struct tags to map JSON fields to Go fields. Writing these structs by hand is tedious and error-prone, especially for deeply nested JSON. This generator infers the correct Go types (string, int64, float64, bool) and creates properly tagged structs automatically.

// JSON input
// { "name": "Alice", "age": 30, "email": "alice@example.com" }

// Generated Go struct
type User struct {
	Name  string `json:"name"`
	Age   int    `json:"age"`
	Email string `json:"email"`
}

// Nested objects become separate structs
type Response struct {
	Data    User   `json:"data"`
	Status  string `json:"status"`
	Count   int    `json:"count"`
}

How Go JSON Tags Work

Each struct field gets a `json:"fieldName"` tag that tells encoding/json how to marshal and unmarshal. Field names are converted to PascalCase (Go convention for exported fields), while the tag preserves the original JSON key. Nested objects become separate named structs.

Integer vs Float Detection

The generator distinguishes between int64 and float64 by checking if a number has a decimal part. Whole numbers like 42 become int64, while 3.14 becomes float64. Arrays infer their element type from the first item.