One-click convert JSON data to Go struct definitions with nested structs and custom tags
Zero Dependencies · Works OfflineThe JSON to Go Struct Converter is a free online developer tool that instantly converts JSON data into Go language struct definitions. It automatically identifies JSON field types and maps them to Go types, supporting nested object struct generation, custom json/bson/gorm tags, and null value pointer handling. Perfect for Go developers who need to quickly generate type definitions from API responses or configuration files, dramatically reducing manual struct writing. All conversion happens locally in your browser — no data is ever uploaded to a server.
1. Paste your JSON data into the input area, or click "Load Example" to try it quickly.
2. Set the struct name and conversion options: pointer types, integer types, tag type, etc.
3. Click "Convert" or use Ctrl+Enter to execute.
4. View the generated Go struct code in the result area below.
5. Click "Copy Code" to copy to clipboard, or download as a .go file.
When integrating third-party APIs, paste the JSON response sample into the tool to instantly generate corresponding Go structs, eliminating tedious manual coding.
Quickly generate configuration struct definitions from JSON config files in Go projects, ensuring correct field types and tags.
Combine with gorm tag options to directly generate Go structs with database tags from JSON data, accelerating data model development.
Rapidly generate request/response struct definitions for inter-service JSON communication, keeping types consistent across services.
Go struct tags are metadata strings attached after field declarations, commonly formatted as `key:"value"`. The json tag is used by encoding/json for serialization/deserialization, bson for MongoDB drivers, and gorm for the GORM ORM framework. When Go's json package deserializes a null JSON field into a value type (e.g., string), it uses the zero value rather than nil, which can cause ambiguity. Using pointer types (*string) precisely distinguishes between null and empty values. Go 1.9+ introduced type alias syntax for further code optimization after generation.
Yes. Nested objects are automatically generated as separate nested structs, each with its own type name.
By default, null fields map to pointer types (e.g., *string). Uncheck "Pointers for null" to use interface{} instead.
Yes. JSON arrays convert to Go slices []T, where T is inferred from element types.
No. All processing happens locally in your browser. Your data never leaves your device.
Yes. Supports json, json+bson, json+gorm, json+db tag combinations, or no tags at all.
Yes. The output follows Go conventions and can be copied directly into a .go file. Adjust type names and tags as needed.