JSONToTable

JSON Schema to Go - Convert Schema Definitions to Type-Safe Structs

Generate type-safe Go structs with validation tags from JSON Schema definitions. Supports Draft 4, 6, 7, and 2019-09.

Step 1

Input JSON Schema

Paste your JSON Schema definition (Draft 4, 6, 7, or 2019-09) that describes your data structure with validation rules.

Example: JSON Schema Input

Paste a JSON Schema like this to generate Go structs:

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "id": { "type": "integer" },
    "name": { "type": "string", "minLength": 1 },
    "email": { "type": "string", "format": "email" }
  },
  "required": ["id", "name"]
}
Step 2

Automatic Type Mapping

The converter automatically maps JSON Schema types to Go types (string, int, float64, bool) and generates nested structs for objects.

•
String types: JSON Schema string maps to Go string with format support
•
Number types: Integer maps to int, number maps to float64
•
Boolean types: JSON Schema boolean maps to Go bool
•
Object types: Each object becomes a separate named Go struct
Step 3

Validation Tags Included

Generated Go structs include validation tags (min, max, email, regexp) compatible with go-playground/validator for runtime validation.

Example: Generated Go Struct Output

Your JSON Schema becomes these Go structs with validation tags:

package main

type Root struct {
  ID    int    `json:"id" validate:"required"`
  Name  string `json:"name" validate:"required,min=1"`
  Email string `json:"email,omitempty" validate:"email"`
}

What is JSON Schema to Go Conversion?

JSON Schema to Go conversion transforms JSON Schema definitions into type-safe Go structs with validation tags. The converter reads your schema's type definitions, required fields, and validation constraints and produces idiomatic Go code ready for production use.

The generated structs are compatible with Go's standard encoding/json package and include validation tags for use with go-playground/validator, enabling runtime validation of incoming data in APIs and microservices.

Frequently Asked Questions

Which JSON Schema versions are supported?

The converter supports JSON Schema Draft 4, 6, 7, and 2019-09. It handles common properties like type, required, properties, enum, format, and validation constraints.

How do validation tags work in Go?

The generated validate tags are compatible with github.com/go-playground/validator/v10. Import the validator package and use it to validate struct instances at runtime.

Can it handle nested objects and arrays?

Yes! The converter automatically generates nested struct definitions for objects and properly handles arrays with typed elements.

What happens with required vs optional fields?

Required fields in the schema become non-pointer types in Go. Optional fields become pointers (*Type) to distinguish between zero values and missing values.

Is this JSON Schema to Go converter free?

Yes, completely free with no limitations. Convert unlimited schemas to Go structs instantly with no registration required.

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