Privacy-first Go struct generation: data stays local
Our Go struct generator engine runs 100% in your local browser sandbox. We never see your backend response schemas or internal API keys.
JSON to Go Structs — the Quick Way
Writing Go structs by hand gets old fast, especially when you're consuming a third-party API with deeply nested responses. You end up staring at the JSON, trying to figure out which fields are ints, which are float64s, and whether that one field that's sometimes empty should be a pointer type or not.
This tool handles all of that. Paste your JSON, and you get properly structured Go code with json tags already attached. Nested objects become separate struct types. Arrays of objects get their own type too. Field names follow Go conventions — exported, PascalCase, the works.
Type Inference Details
We don't just blindly map everything to interface{}. The converter analyzes the actual values — strings stay strings, numbers get properly typed as int or float64, booleans are booleans. Null values become interface{} since Go doesn't have a universal Option type like Rust (though you could change these to pointer types manually).
JSON Tags and Go Conventions
Every field gets a json:"fieldName" struct tag matching the original JSON key. Go field names are exported PascalCase (UserName), while JSON keys often use camelCase or snake_case (user_name). The struct tags handle this mapping sojson.Unmarshal works correctly without any configuration.
Practical Usage with net/http
The standard Go workflow for consuming JSON APIs looks like this: make an HTTP request, read the response body, and unmarshal into your struct with json.NewDecoder(resp.Body).Decode(&result). The generated structs plug directly into this pattern. Compare that to doing everything withmap[string]interface{} where every access needs type assertions.
When to Customize
The generated code is a starting point. For production code, you'll want to add omitemptyto tags for optional fields, use pointer types for fields that might be absent, and add validation tags if you're using a validation library. But the structural work — figuring out types, naming, and nesting — is done for you.
Related JSON Tools
Building a full-stack app? Generate TypeScript interfaces for the frontend from the same JSON payload. If your Go service uses gRPC, try the JSON to Protobuf converter. Validate your JSON structure first with our JSON Validator.