JSON to Go - Convert JSON to Go Structs Online Instantly

JSON to Go: Instant JSON to Golang Struct Converter

Convert your JSON objects into Go (Golang) structs instantly with our free online tool. Whether you are consuming a third-party API or designing your own microservices, mapping JSON data to Go types is a daily task for developers. Our JSON to Go converter automates this process, generating clean, idiomatic, and production-ready code in seconds.

Why Every Go Developer Needs a JSON to Go Tool

Go is a statically typed language, which means every piece of data you handle must have a defined type. Manually writing these types for complex JSON payloads is time-consuming and prone to typos.

Streamline Your Development Workflow

Instead of spending 15 minutes manually typing out field names and tags for a large API response, you can simply paste the JSON here. Our tool handles the heavy lifting, allowing you to move straight to writing your business logic.

Eliminate Unmarshalling Errors

A single typo in a JSON tag can lead to empty fields and frustrating bugs. By using an automated converter, you ensure that the field names in your Go structs and the keys in your JSON stay perfectly synchronized.

Key Features of Our JSON to Go Converter

We’ve optimized this tool to follow the best practices of the Go community.

1. Idiomatic Go Naming Conventions

The tool automatically converts snake_case or camelCase JSON keys into PascalCase for Go struct fields. This ensures your fields are exported and accessible to the encoding/json package.

2. Comprehensive Type Inference

Our engine doesn't just guess; it analyzes your data values to find the most appropriate Go type:

• Strings and Numbers: Maps to string, int, or float64.

• Booleans: Maps to bool.

• Arrays: Automatically generates slice types like []string or []struct.

• Nested Objects: Recursively creates sub-structs for complex data.

3. Support for Inline and Nested Structs

You can choose between "flattened" output (where each object gets its own named struct) or "inline" output (where objects are nested within the parent struct). This flexibility allows you to match the coding style of your specific project.

How to Use the JSON to Go Tool

1. Paste your JSON: Copy your raw JSON data into the input editor on the left.

2. Toggle Options: Choose whether you want to include omitempty tags or use inline structs.

3. Get your Go Code: The generated Golang structs appear instantly in the right-hand panel.

4. Copy and Run: Use the "Copy" button to grab the code and paste it into your Go source file.

Advanced Technical Details

Handling "Omitempty" and Optional Fields

If your API response sometimes omits certain fields, our tool can add the ,omitempty tag to your JSON definitions. This tells the Go encoder to skip those fields if they are empty, keeping your outgoing JSON payloads clean.

Dealing with Mixed-Type Arrays

When an array contains different types of data, the tool will default to []interface{} to ensure your code doesn't crash during unmarshalling, giving you the flexibility to handle the data manually.

Frequently Asked Questions (FAQ)

Is this tool compatible with the latest Go version?

Yes. The generated code uses standard Go syntax compatible with all versions from 1.x to the latest release.

Does my data get sent to a server?

No. Privacy is a priority. All processing is done locally in your browser via JavaScript. Your JSON data and the resulting Go code never leave your computer.

Can I convert large JSON files?

Absolutely. The tool is highly optimized to process even massive JSON files (several MBs) without freezing your browser.