JSON to Go Struct Converter Online
Turn any JSON payload into idiomatic Go structs with `json:"..."` tags, pointer fields for nullable values, and `omitempty` support — 100% in your browser.
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Quick answer
To convert JSON to a Go struct, paste your JSON into the KaviForge JSON to Go Struct Generator. It outputs idiomatic Golang `type ... struct` definitions with exported PascalCase field names, exact `json:"..."` tags, `int64`/`float64` inference, and `omitempty` pointers for optional or nullable fields.
Unmarshaling JSON in Go with `encoding/json` requires strongly typed struct definitions with matching `json` struct tags. Writing those structs manually for deeply nested API responses takes time and invites typos.
This tool walks your JSON payload in the browser and generates clean Go structs. Keys are converted to exported PascalCase identifiers while preserving the exact original key in the `json:"..."` struct tag.
How to Convert JSON to a Go Struct
- 1Paste a sample JSON object or array into the left panel or upload a `.json` file.
- 2Enter your desired root Go struct name (for example, `Payload` or `WebhookEvent`).
- 3Review the generated Go structs and `json` tags in the right panel.
- 4Click "Copy to Clipboard" or download the `.go` source file.
Features
Accurate json:"..." Struct Tags
Every field includes the exact original JSON key in its struct tag for `json.Unmarshal` and `json.Marshal`.
Automatic omitempty & Pointers
Fields missing from some array items or containing `null` are emitted as pointers with `,omitempty`.
Smart int64 vs float64 Inference
Whole numbers become `int64` while decimal or mixed numbers become `float64`.
Nested Struct Extraction
Nested JSON objects and arrays of objects are extracted into clean, named Go struct types.
Download .go File
Copy the struct definitions or download a `.go` file ready for your package.
Private & Browser-Only
Your API responses and backend payloads are never uploaded to any server.
When to Use the JSON to Go Struct Converter
Unmarshal REST API responses in Go
Generate struct types for `http.Get` and `json.NewDecoder(resp.Body).Decode(&target)` in seconds.
Build webhook & Kafka consumers
Quickly scaffold Go types for Stripe, GitHub, or internal event payloads.
CLI tools & microservices
Turn config files and JSON fixtures into strongly typed Go structs.
How JSON Maps to Go Structs
Go’s `encoding/json` package relies on exported struct fields (starting with a capital letter) paired with struct tags like `json:"user_id,omitempty"`. When a JSON array contains objects where a key is only present on some items, Go needs a pointer field so `nil` can represent a missing or null value.
This generator inspects all elements in arrays, promotes mixed integers and floats to `float64`, and emits separate named struct types for nested objects so your code stays readable and maintainable.
JSON to Go Struct Converter FAQs
How do I generate a Go struct from JSON?
Paste your JSON into the left editor. The right editor immediately generates Go `type ... struct` definitions with exported fields and `json` tags.
Does it add omitempty for optional JSON fields?
Yes. When you paste an array of JSON objects and a key is missing from some elements, or when a field is `null`, the generator emits a pointer type with `,omitempty`.
Are my JSON payloads sent to a server?
No. Everything runs client-side in your browser tab.
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