Add valid JSON
Paste an object or array, or open a local .json file. Representative records produce more accurate field types.
Intelligent Go type inference
JSON to Go Struct Converter
Generate clean, idiomatic Go structs from real JSON data. Infer nested objects, slices, numeric types, nullable pointers, exported field names, and exact JSON tags locally.
- Nested struct inference
- Private browser processing
- Copy or download Go
JSON input
Generated Go0 bytes
How to convert JSON to Go structs
Create reusable Go data models in three focused steps.
Configure the model
Name the root struct and choose whether nullable or missing fields should use Go pointer types.
Export Go code
Review the generated structs, copy them into your project, or download a formatted .go source file.
Designed for practical API payloads
The generator examines complete structures and produces readable Go models with accurate serialization tags.
Nested structs
Objects inside objects receive clear named struct definitions instead of generic maps.
Slice inference
JSON arrays become typed Go slices, including slices of generated object structs.
Exact JSON tags
Every exported field receives a backtick JSON tag preserving the original property name.
Local conversion
Your JSON is parsed and converted inside the browser without a server upload.
How JSON maps to Go types
Strings become string, whole numbers become int64, decimals become float64, booleans become bool, arrays become slices, and nested objects become named structs.
Nullable and missing fields
When enabled, values that are null or keys missing from some array records receive pointer types and omitempty tags. Unknown null-only values use interface{}.
Exported fields with exact tags
Go requires uppercase field names for JSON marshaling. The generator creates safe exported identifiers while the JSON tag preserves spaces, hyphens, snake_case, and other original keys.
// JSON { "id": 42, "name": "Alex", "roles": ["admin", "editor"] } // Go type Root struct { ID int64 `json:"id"` Name string `json:"name"` Roles []string `json:"roles"` }
JSON to Go Struct converter FAQs
Practical details about fields, slices, pointers, tags, and generated code.
Does it support nested JSON objects?
Yes. Nested objects become named Go structs and arrays of objects become typed slices.
How are JSON arrays handled?
All sample values are inspected. Compatible values produce a typed slice, while incompatible mixed values use []interface{}.
What happens to null values?
A known nullable value can use a pointer such as *string or *int64. A null-only value becomes interface{} because its concrete type is unknown.
Why are field names capitalized?
Go JSON encoders can only access exported struct fields, which must begin with an uppercase letter.
Are snake_case and hyphenated keys supported?
Yes. The Go field is converted to a safe exported name and the original key remains in its JSON tag.
What type is used for an empty array?
An empty array contains no type evidence, so the converter generates []interface{}.
Is my JSON uploaded to the server?
No. Parsing, type inference, copying, and downloading happen locally in your browser.
Should generated structs be reviewed?
Yes. The structs describe the supplied sample. Compare them with your API contract before production use.