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JSON to Go Struct Converter - Convert JSON to Golang Online Free | DevToolBox

Convert JSON to Go struct definitions online free. Generate proper Go types with json tags, nested structs & arrays. Instant JSON to Go struct conversion in your browser.

About JSON to Go Struct Conversion

Go's strict type system requires defining structs before unmarshaling JSON data. Writing Go structs manually for complex JSON APIs is time-consuming and error-prone. This tool analyzes your JSON and generates idiomatic Go struct definitions with proper field names (PascalCase), correct Go types (string, int, float64, bool), and json struct tags for serialization. Nested objects become separate named structs, arrays are typed by their element type, and null values map to interface{}. You can customize the root struct name, add omitempty tags for optional fields, and choose between separate or inline struct definitions. All processing is done in your browser.

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How to Use

  1. Paste your JSON data into the input panel
  2. Set the root struct name (default: Root)
  3. Toggle omitempty and inline struct options
  4. Copy the generated Go structs into your .go file

Common Use Cases

  • Creating Go structs from REST API response bodies
  • Building typed models for JSON configuration files
  • Generating request/response types for Go HTTP handlers
  • Quickly prototyping Go data models from sample data

Frequently Asked Questions

How do I convert JSON to Go struct?
Paste your JSON data, set the root struct name, and click Convert. The tool generates Go struct definitions with proper types and json tags for each field.
What Go types are generated from JSON?
Strings map to string, integers to int, decimals to float64, booleans to bool, null to interface{}, objects to named structs, and arrays to slices of the element type.
What are json struct tags?
Struct tags like `json:"field_name"` tell Go's encoding/json package how to map between JSON keys and struct fields. The tool adds these automatically.
What does omitempty do?
Adding omitempty to a json tag means the field is omitted from JSON output if it has a zero value (empty string, 0, false, nil). Enable this for optional fields.