JSON to Go Struct Converter

JSON to Go Struct Converter | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Development
Input types: textarea, text, checkbox
Output type: text
Sample coverage: 4
API ready: Yes

Overview

Convert raw JSON payloads into strongly-typed Go struct definitions instantly. This tool automatically infers nested types, exports fields using PascalCase, generates standard json struct tags, and supports optional omitempty tags to streamline your Go backend development.

When to use

When designing Go backend APIs and needing to define Data Transfer Objects (DTOs) from JSON request or response payloads.
When integrating with third-party REST APIs and needing to quickly scaffold Go structs to unmarshal JSON responses.
When refactoring legacy configurations or mock data into native Go structures with proper struct tags.

How it works

1Paste your raw JSON payload into the JSON Input text area.
2Specify a custom name for the Root Type Name and choose whether to enable the Omit Empty Fields option.
3The tool parses the JSON, infers the data types for nested objects and arrays, and generates the corresponding Go struct code.

Use cases

Generating Go struct models for incoming webhook payloads from services like Stripe or GitHub.
Creating configuration structs in Go from existing JSON config files.
Scaffolding API client response structures during integration testing.

Examples

1. Generating API Response Structs

Backend Developer

Background

A developer is integrating a new weather API that returns complex nested JSON data, and needs to parse this data in a Go microservice.

Problem

Manually writing Go structs for a nested JSON response with dozens of fields is tedious and error-prone.

How to use

Paste the weather API JSON response into the JSON Input, set the Root Type Name to 'WeatherResponse', check 'Omit Empty Fields', and copy the generated Go code.

Root Type Name: WeatherResponse, Omit Empty Fields: true

Outcome

Instantly generated Go structs with PascalCase fields and json:"field_name,omitempty" tags, ready to be used with json.Unmarshal.

2. Creating DTOs for User Registration

API Designer

Background

An API designer is defining the payload structure for a user registration endpoint that accepts user details and an array of roles.

Problem

Needs to quickly create a Go struct representing the registration payload to bind incoming JSON requests.

How to use

Input the sample registration JSON, set the Root Type Name to 'RegisterInput', and disable 'Omit Empty Fields' to ensure all fields are strictly mapped.

FAQ

Does the tool support nested JSON objects?

Yes, nested objects are automatically extracted into separate, referenced Go structs or inline structures.

How are JSON field names converted to Go struct fields?

Field names are converted to exported PascalCase to comply with Go visibility rules, while retaining the original names in the json tags.

What does the Omit Empty Fields option do?

It appends ',omitempty' to the generated json struct tags, allowing Go's json package to skip empty or null fields during serialization.

Can I customize the name of the main struct?

Yes, you can define a custom name in the Root Type Name field, which defaults to 'Root'.

Does this tool run server-side?

No, the conversion is performed entirely in your browser, ensuring your JSON data remains private and secure.

Root Type Name: RegisterInput, Omit Empty Fields: false

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Generating API Response Structs

2. Creating DTOs for User Registration

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