JSON to Go Struct Converter
Free online JSON to Go struct converter. 100% client-side.
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What is JSON to Go Struct Converter?
The JSON to Go Struct Converter is a free browser-based tool that transforms any valid JSON into idiomatic Go struct definitions complete with json tags, proper field alignment, and nested struct inference. Paste JSON on the left and get a ready-to-use Go type declaration on the right — with optional omitempty tags, custom root struct naming, and recursive handling of nested objects and arrays. Everything runs 100% client-side with no data leaving your browser.
Key Benefits
- Eliminates hours of manual Go struct boilerplate — paste JSON and copy the result
- Generates idiomatic Go field names (PascalCase) from any JSON key convention
- Includes json struct tags on every field for seamless encoding/json compatibility
- Handles deeply nested JSON with recursive inline struct generation
- Optional omitempty tags for cleaner JSON serialization of zero-value fields
- 100% client-side and offline — no sign-up, no tracking, no data exfiltration
Common Use Cases
- •Generating Go API response types from live API JSON payloads
- •Creating Go config struct definitions from configuration JSON files
- •Converting API documentation examples into Go types for SDK development
- •Prototyping Go data models from JSON Schema or OpenAPI examples
- •Learning Go struct tags and type mapping by seeing JSON-to-Go conversion in action
How to Use JSON to Go Struct Converter
- Paste JSON: Paste your JSON data into the input textarea on the left. You can also type it manually — the output updates live.
- Set Options: Enter a root struct name (default: AutoGenerated) and toggle omitempty if you want json tags to skip nil or zero-value fields.
- Review Output: The Go struct appears instantly on the right with PascalCase field names, json tags, and proper alignment. Nested objects become inline structs.
- Copy or Download: Click Copy to put the struct on your clipboard, or Download to save it as a .go file ready to paste into your project.
Key Features
- Instant live conversion — Go struct output updates in real-time as you type or paste JSON
- Automatic PascalCase field naming from snake_case, camelCase, kebab-case, or space-separated keys
- Optional omitempty json tags to skip nil or zero-value fields during serialization
- Recursive nested struct generation for complex JSON hierarchies with proper indentation
- Smart type inference — strings → string, integers → int, decimals → float64, booleans → bool
- 100% client-side and offline — no server round-trips, no data leaves your browser
Frequently Asked Questions
How does the JSON to Go struct converter handle nested objects?
Nested JSON objects are recursively converted into inline Go structs. For example, a JSON object with a nested "address" property will generate a Go struct with an inline `Address struct { ... }` field, preserving the full type hierarchy.
What Go types are assigned to JSON values?
Strings map to `string`, integers to `int`, decimals to `float64`, booleans to `bool`, null to `interface{}`, and arrays to slices (e.g. `[]string`). Empty arrays default to `[]interface{}` since the element type cannot be inferred.
Can I customize the root struct name?
Yes. Enter any valid Go identifier (starting with an uppercase letter) in the Root Struct Name field. If the name is invalid, it defaults to "AutoGenerated". The struct is exported with `type YourName struct { ... }`.
What does the omitempty option do?
When enabled, each json tag includes the `omitempty` option (e.g. `json:"field,omitempty"`). This tells Go's encoding/json package to omit the field from the output when it has a zero value (empty string, 0, false, nil, etc.).