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JSON → Go Structs

JSON

Generate Go struct definitions from JSON with proper field names and json tags

Paste a JSON API response and get back a matching Go struct with properly PascalCased field names and `json:"..."` tags already wired up, saving the tedium of hand-writing a struct every time you integrate a new endpoint. Nested objects and arrays of objects generate their own nested struct types with sensibly singularized names rather than flattening everything to `interface{}`, though a null field or a genuinely mixed-type array does fall back to `interface{}` since there's no single concrete type to infer. Because JSON doesn't distinguish integers from floating-point numbers as cleanly as Go does, it's worth double-checking numeric field types in the generated struct rather than assuming the inference always guessed right. For the equivalent job targeting Python instead of Go, see JSON to Python.

jsongogolangstructgeneratetypes

How to use JSON → Go Structs

  • 1.Paste a JSON API response to instantly generate a matching Go struct with properly cased field names and `json:` tags.
  • 2.Use it when wiring up a new API client so you don't have to hand-write struct definitions field by field.
  • 3.Paste nested JSON objects and arrays to get correctly nested struct types instead of flattening everything into `interface{}`.

Frequently asked questions

Does it guess Go types correctly for all fields?
It infers types from the JSON values you provide (string, number, bool, nested object/array), but since JSON numbers don't distinguish int from float, you may need to manually adjust types like `int` vs `float64` for your actual use case.
Are field names converted to Go's exported naming convention?
Yes, field names are converted to PascalCase for exported struct fields, with the original JSON key preserved in the `json:` tag.
Does it handle arrays of mixed types?
Arrays are expected to be homogeneous, matching typical JSON API responses — if your sample array has mixed types, the generated struct may not compile cleanly and you'll need to adjust it by hand.
Is my JSON sent to a server?
No, struct generation happens entirely in your browser.

Use via API, SDK, or MCP

Installnpm install @utilix-tech/sdk
Usageimport { json } from '@utilix-tech/sdk'
const result = json.jsonToGo('{"name":"Alice","age":30,"roles":["admin"]}', 'User')
console.log(result)
// type User struct {
//   Name  string   `json:"name"`
//   Age   int64    `json:"age"`
//   Roles []string `json:"roles"`
// }

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