JSON to Go Struct Converter Online

What Is a JSON to Go Struct Converter?

A JSON to Go struct converter analyzes JSON data and generates corresponding Go struct type definitions with proper json struct tags. Go's static type system requires explicit struct definitions to unmarshal JSON data, and writing these by hand for complex API responses is time-consuming. Go developers working with REST APIs, microservices, and data processing pipelines constantly need struct definitions that match their JSON payloads.

This tool examines each JSON property, infers the appropriate Go type (string, float64, bool, nested struct, or slice), generates exported field names in PascalCase, and adds json struct tags that map to the original JSON key names. Nested objects produce separate named struct types, and arrays generate typed slices. The entire generation runs locally in your browser with zero server communication, making it safe to process production API responses.

How to Generate Go Structs from JSON

1. Paste your JSON data into the input panel. API responses, database query results, or any JSON object is accepted.
2. Click Convert to analyze the JSON structure and generate Go struct definitions with PascalCase field names and json tags.
3. Review the generated structs in the output. Nested objects create separate struct types, and arrays produce typed slices.
4. Copy the Go code and paste into your .go files. The structs work directly with encoding/json.Unmarshal for JSON deserialization.

Why Use PinusX JSON to Go Struct Generator?

Go developers building API clients, microservices, and data processing applications need struct definitions that precisely match their JSON payloads. Manually typing struct fields, selecting correct Go types, and adding json tags for every property in a large API response is tedious and error-prone. PinusX generates accurate Go structs instantly with 100% client-side processing — your API response data containing user records, financial transactions, or internal service communication never leaves your browser. This privacy guarantee is critical when working with production data from real systems.

Frequently Asked Questions

How are JSON types mapped to Go types?

JSON strings map to Go 'string', numbers to 'float64' (Go's default JSON number type), booleans to 'bool', null to 'interface{}', arrays to typed slices, and nested objects to separate struct types. Integer detection uses 'float64' by default since encoding/json decodes all numbers as float64.

Are json struct tags included?

Yes. Every field includes a json struct tag mapping to the original JSON key name. For example, a JSON key 'user_name' produces a field 'User_name string `json:"user_name"`'. These tags ensure correct marshaling and unmarshaling with Go's encoding/json package.

How are nested objects handled?

Nested JSON objects generate separate Go struct types. The struct name is derived from the parent struct name and the field name, producing descriptive names like 'UserProfile' for a 'profile' field within a 'User' struct.

Does it support Go naming conventions?

Yes. Field names are exported (capitalized) following Go conventions. The original JSON key is preserved in the json struct tag. Underscored and hyphenated keys are converted to PascalCase for the Go field name.

Is my data private during conversion?

Yes. All JSON to Go struct generation runs locally in your browser. No API data, user records, or JSON payloads are sent to any server. Your data remains entirely on your machine throughout the generation process.

Your data never leaves your browser. 100% client-side processing.