JSON to Go Struct
FreeGenerate Go struct definitions from JSON data
type Root struct {
Id int `json:"id"`
Name string `json:"name"`
Active bool `json:"active"`
}About JSON to Go Struct
Go's strong typing means consuming a JSON API requires a struct with the right fields and JSON tags, and writing those out for a large response is repetitive busywork. This tool reads a JSON sample and generates Go struct definitions with appropriate types and struct tags so you can unmarshal responses into typed values right away.
Paste a representative JSON object and the converter infers Go types for each field, nests structs for nested objects, and adds json tags matching the original keys. It is free, runs in your browser, needs no signup, and returns the structs instantly. Types come from one sample, so provide a complete example and review numeric types and any fields that could be null or absent before relying on the structs.
Common uses
- Generating Go structs for a JSON API you unmarshal in your service
- Creating typed structs with json tags from a sample response
- Bootstrapping nested structs for a structured JSON payload
- Saving boilerplate when modeling JSON in a Go project
- Getting a draft struct to refine for encoding/json
How to use
- 1
Enter your details
Type or paste your content and pick a type using the fields below.
- 2
Customise the output
Adjust the available options — size, colour and other settings — to suit your needs.
- 3
Download or copy
Your result is generated instantly in your browser. Download it or copy it directly to your device.
Why ToolHub?
- Accurate conversion
- Multiple formats
- Instant results
FAQ
Does it add JSON struct tags?
Yes. Each field gets a json tag matching the original key so encoding/json maps it correctly during marshal and unmarshal.
How are numbers typed?
JSON has one number type, so integers and floats are inferred from the sample values. Adjust the chosen Go numeric type if needed.
Are nested objects supported?
Nested objects become embedded or referenced structs, mirroring the JSON hierarchy with typed fields.
What about null or missing fields?
Fields absent or null in the sample may need pointer types or omitempty, since the inferred struct reflects only the example you provide.
Can I use JSON to Go Struct on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.