JSON to Go Struct
Convert JSON to Go struct type definitions instantly
What is JSON to Go Struct?
JSON to Go Struct is a free online tool that converts JSON data into Go (Golang) struct type definitions. It analyzes your JSON structure, infers the correct Go types, and generates clean, ready-to-use struct code with proper PascalCase field names and optional json: tags. Perfect for developers building Go applications that consume JSON APIs.
How to Use JSON to Go Struct
- Paste your JSON data into the input area
- Set a root struct name (default: Root)
- Toggle JSON tags on or off as needed
- Copy the generated Go structs to use in your project
Features
- Automatic type inference (string, int64, float64, bool, nested structs, slices)
- Nested object support — generates sub-structs automatically
- PascalCase field name conversion from any JSON key style
- Optional json struct tags for encoding/decoding
- Handles null values as interface
- 100% client-side — your data never leaves your browser
Frequently Asked Questions
Do I need json tags in my Go structs?
JSON tags (`json:"fieldName"`) are needed when your JSON keys differ from the Go field names (e.g. camelCase keys vs PascalCase fields). They are also required when marshalling/unmarshalling JSON using the standard encoding/json package.
How are numeric types handled?
Integer values become int64 and decimal values become float64. These are the most broadly compatible Go numeric types for JSON data.
What happens with arrays?
Arrays are converted to Go slices. The element type is inferred from the first element. Empty arrays become []interface.
Is my JSON data safe?
Yes. All processing happens entirely in your browser. Your JSON is never sent to any server.