Runs locally in your browser
JSON to Go Struct Converter
Generate readable Go structs from JSON. Nested objects, arrays, nullable values, and JSON field tags are handled automatically.
✓ Go structs generated automatically in your browser
How to convert JSON to a Go struct
- Paste a representative JSON object or array.
- Choose the root struct and package names.
- Enable
omitemptywhen zero-value fields may be omitted during encoding. - Copy or download the generated Go source.
How JSON values map to Go
| JSON shape | Generated Go shape | Review before use |
|---|---|---|
| Whole / decimal number | int / float64 | Numeric width and precision |
| Nested object | Named struct | Domain-specific type names |
| Array | []T | Mixed item shapes and empty arrays |
| Concrete value plus null | Pointer | Missing, null, and zero-value semantics |
Review inferred types and JSON tags
JSON does not distinguish every Go numeric or domain type. Whole sample numbers become int, decimals become float64, and timestamp-looking strings remain string rather than automatically becoming time.Time. Objects in the same array are merged to infer one reusable element struct.
Generated field names are exported Go identifiers while JSON tags preserve the original keys. Enable omitempty only when omitting zero values during encoding matches the API contract; it does not make a field optional while decoding.
Frequently asked questions
How does JSON to Go type inference work?
The converter recursively maps JSON strings, integers, decimals, booleans, arrays, objects, and null values to Go types. Objects found in the same array are merged into one struct shape.
Why are some fields pointers?
A field becomes a pointer when the sample contains both a concrete scalar or struct value and null. This preserves the difference between a missing value and the type’s zero value.
Is the generated Go code ready for production?
It is a useful starting point. Review numeric widths, validation rules, custom time types, and domain-specific names before using generated structs in production.
Is my JSON uploaded?
No. JSON parsing and Go struct generation happen locally in your browser.