JSON to Go Structs
Generate Go structs from JSON with `json` tags. 100% client-side conversion. Supports omitempty, pointer fields, and smart type inference.
Convert any JSON payload into idiomatic Go structs instantly. This tool infers the correct Go types
(int vs
float64),
generates `json:"..."`
tags for the encoding/json
package, and extracts nested objects into separate struct definitions.
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Frequently asked questions
What is a Go struct and how does JSON unmarshaling work?
A Go struct is a typed collection of fields used to group data together. When you use the encoding/json package to parse (unmarshal) JSON data, Go looks for struct fields that match the JSON keys. It uses reflection to populate your struct fields with the values from the JSON string.
How do I parse JSON with the generated Go structs?
Copy the generated structs into your Go file. Then, declare a variable of your struct type, and pass a pointer to it to json.Unmarshal(). For example: var data Root; err := json.Unmarshal(jsonBytes, &data).
How does this handle omitted or optional fields in Go?
You can toggle the omitempty flag to ignore zero-values when marshaling back to JSON. If a JSON value can be null or missing, you can toggle the "Use pointers (*)" option to generate pointer types (e.g., *string), which allows Go to distinguish between a missing field (nil) and a zero-value (empty string).
What are struct tags?
Struct tags are string literals placed after the type in a struct field declaration (e.g., `json:"my_field"`). They tell the json package exactly which JSON key corresponds to the struct field, overriding the default behavior of case-insensitive matching.
How does the tool handle nested objects?
The tool extracts nested JSON objects into separate, flat Go struct definitions. This is the recommended approach in Go as it makes your types reusable and your code much cleaner compared to deeply nested inline structs.