JSONStudio — Free Online JSON Formatter, Viewer & Validator

JSON to Go Struct: a worked example

This is real output from the converter on this page, not an illustration. The input below deliberately includes the cases that trip up naive converters — a float, a null, an empty array, an array of mixed types, and a nested object.

Input JSON

{
  "id": 101,
  "name": "Ada Lovelace",
  "active": true,
  "score": 9.5,
  "deletedAt": null,
  "tags": [
    "admin",
    "ops"
  ],
  "scores": [],
  "mixed": [
    1,
    "two"
  ],
  "createdAt": "2026-01-15T08:00:00.000Z",
  "profile": {
    "city": "Lisbon",
    "zip": 1000
  },
  "addresses": [
    {
      "line1": "1 Rua Augusta",
      "country": "PT"
    }
  ]
}

Generated Go Struct

type User struct {
	ID int64 `json:"id"`
	Name string `json:"name"`
	Active bool `json:"active"`
	Score float64 `json:"score"`
	DeletedAt *string `json:"deletedAt"`
	Tags []string `json:"tags"`
	Scores []interface{} `json:"scores"`
	Mixed []interface{} `json:"mixed"`
	CreatedAt string `json:"createdAt"`
	Profile struct {
	City string `json:"city"`
	Zip int64 `json:"zip"`
} `json:"profile"`
	Addresses []struct {
	Line1 string `json:"line1"`
	Country string `json:"country"`
} `json:"addresses"`
}

How each JSON type maps to Go Struct

Every row is generated by running that JSON value through the converter, so the table always matches what the tool actually emits.

JSON typeExample valueGenerated Go Struct
string"Ada Lovelace"Field string `json:"field"`
integer101Field int64 `json:"field"`
float9.5Field float64 `json:"field"`
booleantrueField bool `json:"field"`
nullnullField *string `json:"field"`
array of strings["admin", "ops"]Field []string `json:"field"`
empty array[]Field []interface{} `json:"field"`
mixed-type array[1, "two"]Field []interface{} `json:"field"`
nested object{ "city": "Lisbon" }see the full example above
date-like string"2026-01-15T08:00:00.000Z"Field string `json:"field"`

JSON to Go Struct Converter – Free Online Tool

Convert JSON to Go Struct instantly with JSONStudio's free online converter. Whether you're a backend developer working with configuration files, a DevOps engineer managing infrastructure as code, or a data analyst processing API responses, ourGo Struct converter provides instant, accurate conversions with zero data uploads.

JSONStudio's JSON to Go Struct converter runs entirely in your browser, ensuring maximum security and privacy. All processing happens client-side, so your sensitive JSON data never leaves your device. No signup, no tracking, no storage—just fast, reliable conversion when you need it.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format that's become the de facto standard for API communication, configuration files, and structured data storage. Its human-readable syntax and language-agnostic design make it ideal for modern web development, mobile apps, and microservices architectures.

JSON is used everywhere—from REST APIs and GraphQL responses to configuration files and database exports. Its simplicity and widespread support across programming languages have made it the preferred format for data exchange in modern software development.

What is Go Struct?

Go (Golang) is a statically typed, compiled programming language designed at Google. Go structs are used to define collections of fields, similar to classes in other languages. They are the backbone of data modeling in Go applications.

Converting JSON to Go structs is a common task for Go developers working with APIs. Instead of manually typing out struct definitions and adding JSON tags, our converter automates this process, generating ready-to-use Go code that matches your JSON structure.

Why Convert JSON to Go Struct?

  • Save time: Instantly generate complex Go struct definitions from JSON
  • Error prevention: Avoid typos and type mismatches when manually creating structs
  • JSON tags: Automatically generate correct `json:"..."` tags for marshaling/unmarshaling
  • Nested structures: Automatically handle nested objects by creating related structs
  • Type safety: Ensure your Go code correctly models the expected JSON data

How to Convert JSON to Go Struct Online

  1. Paste your JSON: Copy your JSON data from any source—API response, configuration file, or database export—and paste it into the left panel.
  2. Automatic validation: JSONStudio instantly validates your JSON syntax and highlights any errors, ensuring your data is properly formatted before conversion.
  3. Instant conversion: Select "Go Struct" from the converter dropdown and watch as your JSON transforms into Go Struct format in real-time.
  4. Copy or download: Use the one-click copy button to copy the converted Go Struct output, or download it directly to your device.

All conversion happens entirely in your browser using client-side processing. Your JSON data is never uploaded to any server, ensuring complete privacy and security for sensitive information.

Features of JSONStudio JSON to Go Struct Converter

  • Instant conversion: Real-time conversion with no delays or waiting
  • Large file support: Handle JSON files of any size without performance issues
  • Syntax highlighting: Color-coded output makes it easy to read and verify
  • Error detection: Automatic validation catches JSON syntax errors before conversion
  • One-click copy: Copy converted output to clipboard instantly
  • No signup required: Start converting immediately without creating an account
  • Free forever: All features available at no cost, with no usage limits
  • Dark mode support: Comfortable viewing in any lighting condition

Example JSON to Go Struct Conversion

Input JSON:

{
  "name": "John Doe",
  "age": 30,
  "email": "john@example.com",
  "active": true
}

Converted Go Struct:

type Root struct {
	Name   string `json:"name"`
	Age    int64  `json:"age"`
	Email  string `json:"email"`
	Active bool   `json:"active"`
}

Is JSONStudio Secure?

100% client-side processing: All JSON conversion happens entirely in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security.

No logging or tracking: JSONStudio doesn't log, store, or track any of your JSON data. We don't use analytics that capture your content, and we don't maintain any server-side storage of your files.

No data uploads: Unlike many online converters that upload your files to servers, JSONStudio processes everything locally. This means even if you're working with sensitive API keys, passwords, or proprietary data, it remains completely private.

No server involvement: JSONStudio is a fully static site with no backend server. There is no server to send your data to, even accidentally.

Who Should Use This Tool?

  • Go developers building REST APIs or microservices
  • Backend engineers consuming third-party JSON APIs in Go
  • Full-stack developers working with Go backends
  • Students learning Go data structures and JSON handling

Frequently Asked Questions

Is this JSON to Go struct converter free?

Yes, JSONStudio's JSON to Go converter is 100% free. You can generate as many structs as you need without any limits or signup.

Does it generate JSON tags?

Yes, the converter automatically adds `json:"fieldname"` tags to each struct field, ensuring seamless integration with Go's `encoding/json` package.

How does it handle nested objects?

Nested JSON objects are converted into separate Go structs, or inline anonymous structs depending on the complexity, maintaining the correct hierarchy.

Does it support nullable fields?

The converter attempts to detect nullable fields and may use pointers (e.g., `*string`) to represent optional values in Go.

Is my JSON data secure?

Absolutely. All conversion happens locally in your browser. Your JSON data is never sent to our servers.

Related Tools

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