JSON to Go Struct Converter

Struct Name:

Inline Structs:

Omitempty:

JSON Input

Go Struct Output

Features

⚡

Smart Type Inference

Automatically maps JSON types to Go types: string, int, int64, float64, bool, and interface{} for null values. Distinguishes integers from floats.

🛠

Nested Structs

Handles deeply nested JSON objects by creating separate named structs or inline anonymous structs based on your preference.

🏷

JSON Tags

Every field includes proper json struct tags matching the original JSON key names. Toggle omitempty for optional fields in API responses.

🔧

Go Naming Conventions

Converts snake_case and kebab-case keys to PascalCase. Recognizes common Go acronyms like ID, URL, API, HTTP, and JSON.

How JSON to Go Struct Conversion Works

When building Go applications that consume JSON APIs, you need struct definitions that match the JSON structure. Manually writing these structs is tedious and error-prone, especially for large or deeply nested responses. This tool automates the process by parsing your JSON and generating idiomatic Go code.

Type Mapping

string maps to Go string
integer maps to Go int (or int64 for large values)
float maps to Go float64
boolean maps to Go bool
null maps to Go interface{}
object maps to a named or inline Go struct
array maps to a typed Go slice like []string or []MyStruct

Common Use Cases

API Integration: Convert JSON API responses into Go structs for use with encoding/json.
Configuration Files: Generate structs for JSON config files used in Go applications.
Data Models: Quickly scaffold data models from sample JSON data.
Prototyping: Speed up development by auto-generating boilerplate struct code.

Frequently Asked Questions

How does JSON to Go struct conversion work? ▼

The tool parses your JSON input and analyzes each field's type. It maps JSON strings to Go string, numbers to int or float64, booleans to bool, nested objects to separate structs, and arrays to slices. Each field gets a json tag matching the original key name. Field names are converted to PascalCase following Go conventions.

What is the omitempty tag in Go JSON? ▼

The omitempty option in a Go json struct tag tells the JSON encoder to omit the field from the output if it has a zero value (empty string, 0, false, nil, empty slice, or empty map). This is useful for optional fields in API responses where you don't want to include empty values in serialized output.

Should I use inline or separate structs? ▼

Separate structs are better when nested objects are reused across multiple parent structs or when they represent distinct domain concepts. Inline (anonymous) structs are convenient for one-off nested structures that are only used in one place. Separate structs also make testing easier since you can create instances of nested types independently.

How does the tool handle JSON arrays? ▼

Arrays of primitives become Go slices like []string or []int. Arrays of objects use the first element to infer the struct shape and create a typed slice like []Project. Empty arrays become []interface{} since the element type cannot be determined. Mixed-type arrays also become []interface{}.

Is my JSON data safe with this tool? ▼

Yes. All conversion happens entirely in your browser using JavaScript. No data is sent to any server. The tool works completely offline once the page is loaded. You can verify this by opening your browser's developer tools and checking the Network tab.

Explore More Developer Tools

Convert between formats, generate code, and validate data with our free developer tools. No sign-up required.

JSON Formatter → JSON/YAML Converter → JSON to TypeScript →