JSON to Go
Generate clean Go structs with json struct tags, nested types, and pointer null-safety instantly in your browser.
- Runs in your browser
- Free, no signup
package main
type Profile struct {
Bio string `json:"bio"`
Reputation int `json:"reputation"`
}
type Root struct {
Id int `json:"id"`
Name string `json:"name"`
Email string `json:"email"`
IsAdmin bool `json:"is_admin"`
Roles []string `json:"roles"`
Profile *Profile `json:"profile"`
}
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Go requires explicit struct definitions with backtick tags for JSON unmarshaling. Manually writing structs for deeply nested API responses is tedious. This tool translates any JSON payload into idiomatic Go struct types with precise json tags.
Nested objects become standalone Go structs referenced as pointers (*Child) for memory efficiency and safe nil handling. Lists become slices ([]T), numbers are typed as int or float64 based on precision, and fields use exported PascalCase identifiers matching Go conventions.
How to use this tool
- Paste your JSON payload into the input editor or click "Load Sample".
- Specify your root struct name (e.g. Root or ApiResponse) and optional package name (default: main).
- View generated Go struct definitions live on the right editor.
- Click "Copy Code" or "Download .go" to integrate directly into your Go project.
Accurate Golang JSON Struct Tags
Each struct field includes standard `json:"key"` tags. PascalCase names are generated for exported visibility while accurately preserving the original JSON key in the tag.
Pointer types (*Type) are used for nested models and nullable properties, ensuring proper distinction between nil values and empty struct instances during json.Unmarshal.
Frequently asked questions
How does the generator determine between int and float64?
Whole numbers are typed as int, while numbers containing fractional components are typed as float64. Heterogeneous number collections default to float64.
Can I change the package declaration?
Yes. Enter your target package name (such as models or dto) in the package input in the options toolbar.