How are JSON numbers typed in Go?

A number maps to int64 when every value is a whole number, and to float64 when it has a fractional part. Mixed numeric arrays collapse to []float64 so they stay numeric.

How are nested objects and arrays handled?

Each nested object becomes its own exported struct named after the PascalCased key, referenced as a pointer, and arrays become []T. A mixed-type array falls back to []interface{}. Every field gets a json:"originalKey" tag.

Is my JSON uploaded anywhere?

No. The inference runs entirely in your browser with JavaScript — your data is never sent to a server or stored.

JSON to Go Struct — Gera Tools

Generate Go structs from JSON

Paste a representative JSON sample and get typed Go structs complete with json:"..." struct tags. Nested objects each become their own exported struct, arrays become slices, and common initialisms like ID and URL are capitalised the way Go’s style guide expects.

Numbers become int64 when integral and float64 otherwise. Because the types are inferred from one sample, treat the output as a strong starting point. All inference happens in your browser — your JSON is never uploaded or stored.