Avro Schema to JSON Example Generator [2025]

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Generate sample JSON data from Apache Avro schemas with support for complex types, arrays, and customizable generation options. Perfect for testing and documentation.

✓ Type Support✓ Example Generation✓ Download Support

Avro Schema

JSON Example

Generation Features

Type Support

  • •

    Primitive Types

    Full support for strings, numbers, booleans, and null

  • •

    Complex Types

    Records, arrays, maps, and enums

  • •

    Union Types

    Proper handling of nullable and union fields

Generation Options

  • •

    Null Generation

    Optional null value generation

  • •

    Array Examples

    Configurable array sample generation

  • •

    Output Format

    Pretty-print or compact JSON output

Common Use Cases

Testing

  • • Mock data generation
  • • Schema validation
  • • Integration testing
  • • Example creation

Documentation

  • • API documentation
  • • Schema examples
  • • Usage guides
  • • Reference material

Development

  • • Data modeling
  • • Prototyping
  • • Code generation
  • • Schema design

Frequently Asked Questions

What data types are supported?

The generator supports all Avro primitive types (null, boolean, int, long, float, double, bytes, string) and complex types (records, enums, arrays, maps, fixed). Union types are also fully supported.

How are arrays handled?

When array generation is enabled, the tool creates an example array with a single item showing the structure. You can customize this behavior through the generation options.

What about null values?

You can control null value generation through the options. When enabled, fields that can be null will be generated as null values. When disabled, example values will be generated instead.

Can I modify the generated examples?

Yes, the generated JSON is a starting point that you can customize. You can modify values, add more array items, or adjust the structure while maintaining compatibility with the schema.

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