JSON to Go Struct
Convert any JSON object to a Go struct online for free with our json to go struct converter. Automatically infers Go types, generates separate structs for nested objects, adds json struct tags, and converts snake_case keys to PascalCase field names — no signup required.
Paste your JSON object and click Convert. The tool infers Go types for every field and generates a complete struct with json tags — including nested structs for nested objects. All conversion runs locally in your browser.
- Nested JSON objects generate separate named structs automatically
- snake_case JSON keys are converted to PascalCase Go field names
- ISO 8601 datetime strings are inferred as
time.Time - Use "Pointer for null fields" to generate
*Tfor nullable fields - Use "json + db tags" for GORM or sqlx database field mapping
Why Use Our JSON to Go Struct Converter?
Fast, accurate, and configurable JSON to Go struct generation with tags and type inference
Instant JSON to Go Struct Conversion
Convert any JSON object to a Go struct instantly in your browser. Our json to go struct converter infers all Go types — string, int64, float64, bool, []T, time.Time, and nested structs — in milliseconds.
Secure JSON to Go Struct Online
All JSON to Go struct conversion happens locally in your browser. Your JSON data never leaves your device, ensuring 100% privacy when you use our json to go struct converter online.
JSON to Go Struct Online - No Installation
Use our json to go struct converter directly in your browser with no downloads, plugins, or software required. Convert JSON to Go structs from any device, any time.
Struct Tags, Pointer Types & Nested Structs
Our json to go struct converter generates json struct tags automatically, supports db tags for GORM/sqlx, configures pointer types for nullable fields, and generates separate named structs for nested objects.
Common Use Cases for JSON to Go Struct Converter
Practical applications for JSON to Go struct generation online
REST API Client Development
Go developers use our json to go struct converter to generate structs from REST API response examples. Paste the JSON from your API docs and instantly get typed Go structs for json.Unmarshal and HTTP client code.
GORM & Database Model Definition
Backend developers use our json to go struct converter with "json + db tags" to create GORM models and sqlx structs from JSON data. Generate database-ready Go structs with both json and db field tags in one step.
Third-Party API Integration
Developers integrating with Stripe, GitHub, Twilio, or other APIs use our json to go struct converter to generate Go structs from API documentation examples. Get accurate typed structs without reading through SDK source code.
Microservice Data Modeling
Go microservice developers use our json to go struct converter to model JSON payloads exchanged between services. Convert request and response schemas to typed Go structs for gRPC, REST, and message queue handlers.
Configuration File Parsing
Go developers use our json to go struct converter to create typed structs from JSON configuration files. Replace untyped map[string]interface{} access with structured Go structs for better IDE support and compile-time safety.
JavaScript to Go Migration
Teams migrating from Node.js to Go use our json to go struct converter to quickly model existing JSON data structures as typed Go structs. Convert API contracts and data models in seconds.
Understanding JSON to Go Struct Conversion
How JSON types map to Go struct fields and type annotations
What is a Go Struct?
A Go struct is a composite data type that groups together fields with different types under a single name. Structs are the primary way to model structured data in Go — they are used for JSON deserialization, database models, API request/response types, and configuration objects. Our json to go struct converter analyzes a JSON object and generates a complete Go struct with proper type annotations and json struct tags for seamless JSON marshaling and unmarshaling. snake_case JSON keys are automatically converted to PascalCase Go field names following Go naming conventions.
How Our JSON to Go Struct Converter Works
- 1. Paste Your JSON: Enter any valid JSON object or array. The converter accepts any JSON structure including deeply nested objects and arrays of objects. All processing happens locally in your browser — your JSON data never leaves your device.
- 2. Configure Options: Set the root struct name, choose struct tag style (json only, json + db, or none), and configure pointer type handling for nullable fields. ISO 8601 datetime strings are automatically inferred as
time.Time. - 3. Copy or Download: View the generated Go code with
package maindeclaration and necessary imports. Copy to clipboard or download asmodels.gofor immediate use in your Go project.
JSON to Go Type Mapping
- string → string: JSON strings map to Go
string. ISO 8601 datetime strings (e.g."2024-01-15T10:30:00Z") are inferred astime.Time. - integer → int64, float → float64: JSON integers map to
int64; JSON floats map tofloat64. - boolean → bool: JSON
true/falsemap to Gobool. - null → interface or *T: JSON
nullmaps tointerfaceby default. With "Pointer for null fields" mode, null fields become*string(or the appropriate pointer type). - array → []T: JSON arrays map to Go slices. The element type is inferred from the first item. Empty arrays map to
[]interface. - object → nested struct: Nested JSON objects generate separate named Go structs. The struct name is derived from the JSON key in PascalCase.
Go Struct Tags Explained
Go struct tags are string literals attached to struct fields that provide metadata for encoding/decoding libraries. The json tag controls how the field is marshaled to and from JSON — for example, `json:"first_name,omitempty"` maps the Go field FirstName to the JSON key "first_name" and omits the field from JSON output when it is empty. The db tag is used by GORM and sqlx for database column mapping. Our json to go struct converter generates both json and dbtags when the "json + db tags" option is selected, making the generated structs immediately usable with both JSON APIs and SQL databases.
Related Tools
JSON to YAML
Convert JSON to YAML format instantly - Free online JSON to YAML converter
XML to YAML
Convert XML to YAML format for configuration migration - Free online XML to YAML converter
CSV to YAML
Convert CSV spreadsheet data to YAML format - Free online CSV to YAML converter
TSV to YAML
Convert TSV tab-separated data to YAML format - Free online TSV to YAML converter
Frequently Asked Questions About JSON to Go Struct Converter
Common questions about JSON to Go struct generation and type inference
A JSON to Go struct converter analyzes a JSON object and generates a Go struct with proper type annotations and json struct tags. Our converter infers string, int64, float64, bool, []T, time.Time, and nested struct types — and converts snake_case keys to PascalCase field names automatically.
Nested JSON objects automatically generate separate named Go structs. The struct name is derived from the JSON key in PascalCase. For example, an "address" property generates an Address struct, and the parent struct references it by name.
JSON keys are converted to PascalCase Go field names following Go naming conventions. snake_case keys (e.g. "first_name") become PascalCase (e.g. "FirstName"). Common acronyms like "id", "url", "api", and "uuid" are uppercased (e.g. "userID", "apiURL").
Go struct tags are string literals attached to struct fields that control JSON marshaling. The json tag maps Go field names to JSON keys — for example, `json:"first_name,omitempty"` maps FirstName to "first_name" in JSON. The omitempty option omits the field when it is empty.
Use pointer types when a field can be absent or null in JSON. A *string field can be nil (absent) or point to a string value, while a string field always has a value. Use "Pointer for null fields" to generate *T only for fields that are null in the sample JSON.
JSON strings that match the ISO 8601 datetime format (e.g. "2024-01-15T10:30:00Z") are automatically inferred as time.Time. The converter adds the necessary import "time" to the generated code.
Yes! Our json to go struct converter is 100% free with no signup, no account, and no usage limits. Convert JSON to Go structs for any project directly in your browser.
Absolutely. All JSON to Go struct conversion happens locally in your browser using JavaScript. No JSON data is sent to any server, ensuring complete privacy for sensitive API payloads and data models.
Yes! Select "json + db tags" to generate structs with both json and db struct tags. The db tag maps Go field names to database column names, making the generated structs immediately usable with GORM, sqlx, and other Go database libraries.