Convert JSON to Go
struct. json tags,
omitempty, pointers.
Generate Go structs with json tags from any JSON sample. Nested structs, pointer types for nullable fields, omitempty options. Includes json.Unmarshal snippets. Runs entirely in your browser.
*interface{} — or pointer types if enabled.
The type inference rules applied to each JSON value.
| JSON value | Go type | With pointer option |
|---|---|---|
"Alice" | string | string |
42 | int | int |
98.5 | float64 | float64 |
true | bool | bool |
null | interface{} | *string / *int… |
["a","b"] | []string | []string |
[{…},{…}] | []ChildStruct | []ChildStruct |
{…} | ChildStruct | ChildStruct |
When calling a REST API in Go, you need structs that match the response JSON for json.Unmarshal. Generate from a real API response sample and use immediately with http.Get + json.NewDecoder(resp.Body).Decode(&result). The json tags ensure field name mapping even when the API uses snake_case and your Go code uses PascalCase.
Go HTTP handlers use json.Marshal or json.NewEncoder to write JSON responses. Define the response struct first — generate it from a sample, then implement the handler. Using explicit structs instead of map[string]interface{} gives you compile-time field checking and IDE autocomplete.
Go applications often read configuration from JSON files. Generate the config struct from your JSON config sample — then use json.NewDecoder(f).Decode(&cfg) to load it. With pointer types enabled, optional config fields default to nil and you can check if they were set with if cfg.Field != nil.
Go is the language of cloud-native tooling — Kubernetes controllers, Terraform providers, Docker plugins. These tools heavily use JSON/YAML APIs with complex nested structures. Generate struct definitions from the API spec JSON samples to accelerate development of controllers and operators.
Go structs generated
in your browser. No upload.
The entire struct generation runs in JavaScript locally. Your JSON is never transmitted to any server. The generated code follows Go conventions: PascalCase field names, correct json tags matching the original JSON key, and the encoding/json package patterns used throughout the Go standard library.
The output is immediately usable with encoding/json — json.Unmarshal([]byte(data), &result) without any additional configuration. For HTTP responses: json.NewDecoder(resp.Body).Decode(&result).