JSON to Go Struct Converter Online — Instant Golang Types

Idiomatic Go Struct Generation from JSON

In Go (Golang), structured data interchange relies heavily on statically typed structs decorated with field tags from the encoding/json package. Writing these struct definitions by hand for deep REST payloads, microservice responses, or Kubernetes configs is tedious and prone to casing errors.

FormJson automatically parses JSON documents, generates clean PascalCase field names, infers numeric precision (int64 vs float64), and extracts nested objects into decoupled, reusable structs.

JSON to Golang Type Mapping Matrix

Standard Go JSON Unmarshaling Example

Copy your generated struct directly into your Go package and deserialize HTTP response bodies effortlessly:

package main

import (
    "encoding/json"
    "fmt"
    "net/http"
)

func fetchUser() (*AutoGenerated, error) {
    resp, err := http.Get("https://api.example.com/user")
    if err != nil {
        return nil, err
    }
    defer resp.Body.Close()

    var user AutoGenerated
    if err := json.NewDecoder(resp.Body).Decode(&user); err != nil {
        return nil, fmt.Errorf("decode failure: %w", err)
    }
    return &user, nil
}