JSON to Go

Convert JSON to Go structs instantly. Free online tool to generate Go struct definitions with json tags from JSON data. Perfect for API development and data modeling. No signup required.

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Our JSON to Go Struct Converter instantly transforms JSON data into properly formatted Go struct definitions. This tool is essential for Go developers working with APIs, configuration files, or any JSON data. The converter automatically generates json tags for each field, handles nested structures, and infers the correct Go types including string, int, float64, bool, and complex struct types. Perfect for quickly bootstrapping Go data models from JSON examples.
  1. Paste your JSON data or click Load Demo to try with sample data
  2. The Go struct is generated instantly as you type
  3. Review the generated struct with proper json tags
  4. Copy the generated code or download as a .go file
  5. Use the struct in your Go project for JSON marshaling/unmarshaling

What are json tags in Go structs?

Json tags are annotations that tell Go's encoding/json package how to map struct fields to JSON keys. They're specified using backticks like `json:"fieldName"` and enable proper JSON serialization and deserialization.

How does the tool handle nested JSON objects?

The converter creates separate struct definitions for each nested object. For example, if your JSON has a user with an address, it generates both User and Address structs with proper type references.

What Go types are generated for JSON values?

The tool maps JSON types to Go types: strings become string, integers become int, decimals become float64, booleans become bool, arrays become slices, and objects become nested structs.

How are null values handled?

Null values in JSON are converted to interface{} in Go, which can hold any value including nil. For more specific handling, you may want to use pointer types or custom nullable types.

Can I use this for API response modeling?

Absolutely! This is one of the most common use cases. Simply paste a sample API response and get instant Go structs ready for use with json.Unmarshal() in your Go code.

Are the field names properly capitalized?

Yes! Go requires exported fields to start with uppercase letters. The tool automatically capitalizes field names while preserving the original JSON key names in the json tags.

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