JSON to Go

Generate Go structs from a JSON sample, with json tags carrying the original key names, omitempty for keys that are sometimes absent, and pointer types for fields the sample shows as null. Nested objects become named struct types.

Root name

JSON

Result will appear here

Ready. Press Generate or Ctrl+Enter.

How to use the JSON to Go

Paste a JSON sample.
Set the root struct name.
Press Generate and copy the code.

Example

The null notes field becomes a pointer type.

{
  "name": "json-utils",
  "version": "1.0.0",
  "private": false,
  "tags": ["json", "tools"],
  "author": { "name": "Ada", "active": true },
  "score": 9.5,
  "notes": null
}

Frequently asked questions

Why pointers for null fields?

A pointer distinguishes an absent or null value from a zero value, which matters for patch style payloads.

Which numeric types are used?

Whole numbers become int64 and decimals float64, matching encoding/json behavior for unknown ranges.