Does it handle nested objects and arrays?

Yes. Nested JSON objects become nested anonymous Go structs, and arrays become slices. Arrays of objects merge every field seen across all elements into one struct so no field is missed.

How are numbers typed?

Whole numbers are generated as int64 and numbers with a decimal point as float64, matching how encoding/json typically maps numeric JSON values.

What happens to snake_case or kebab-case keys?

JSON keys are converted to PascalCase for the Go field name (for example user_id becomes UserId) while the original key is preserved in the json struct tag.

Is my JSON sent to a server?

No. Parsing and struct generation both run in your browser with plain JavaScript. Nothing is uploaded anywhere.

What does it do with null values?

A field that is null in the sample JSON is typed as interface{} since Go cannot infer a concrete type from a single null value.

JSON to Go

Name: JSON to Go
Availability: InStock
Author: Nham Vu

Paste JSON and instantly get matching Go struct definitions with nested types, slices, and json tags.

JSON Input

Struct name

Package name

Include package declaration

Go Struct

Anonymous nested structs are generated in place, the same shape gofmt would produce.

Copied!

Summary

Paste JSON and instantly get matching Go struct definitions with nested types, slices, and json tags.

How it works

Paste JSON into the input box, or click "Load Sample" to try it with example data.
Set a root struct name and, optionally, a package name.
The Go struct definition renders on the right as you type.
Nested objects become nested structs; arrays of objects merge their fields into one struct.
Click "Copy Go Code" to copy the generated struct to your clipboard.

Use cases

Bootstrap Go structs for a REST API client from a sample response.
Type a webhook payload before writing the handler.
Generate structs from third-party API documentation JSON.
Check how encoding/json will map a JSON shape before writing code by hand.
Speed up prototyping Go services that consume external JSON.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu