JSON to Go Struct

The tool parses your JSON input and automatically generates Go struct definitions. It maps JSON value types to corresponding Go types, converts keys to PascalCase field names, and optionally adds json tags for serialization. Nested objects become separate named structs.

Strings map to string, integers to int64, floating-point numbers to float64, booleans to bool, null to interface{}, arrays to []Type, and objects to nested structs. You can choose between int64 and float64 for all numbers.

Json tags like `json:"fieldName"` tell Go's encoding/json package how to map struct fields to JSON keys during marshaling and unmarshaling. The omitempty option skips fields with zero values in the output.

When enabled, nullable fields use pointer types like *string instead of string. This lets you distinguish between zero values (empty string, 0) and missing or null values in your Go code.

Yes. Nested objects are automatically converted into separate named Go structs. Arrays of objects become slice types referencing the generated struct. Deep nesting is fully supported.

JSON keys are converted to Go-style PascalCase names. For example, "user_name" becomes "UserName" and "firstName" becomes "FirstName". You can specify a custom root struct name.

Yes. Paste a JSON array and the tool uses the first element to infer the struct definition. The generated Go type will be a slice ([]StructName) of the inferred struct.

No. All conversion happens entirely in your browser using JavaScript. Your JSON data never leaves your device, ensuring complete privacy and security.

It's ideal for Go developers working with REST APIs, configuration files, or database responses. Instead of manually writing struct definitions, you get production-ready Go code in seconds.

Yes, completely free with no registration required. There are no usage limits — convert as many JSON inputs as you need.