OpenAPI to Apache Avro Converter

Convert OpenAPI 3.0, 3.1, and Swagger 2.0 schemas into Apache Avro record definitions in your browser.

At a glance

OpenAPI to Apache Avro Converter transforms OpenAPI 3.0, 3.1, and Swagger schema components into valid Apache Avro (.avsc) JSON records. It translates OpenAPI types and formats to Avro primitives, repeated arrays to schema items, enums to symbol lists, and optional fields to nullable unions client-side in browser memory.

Developer Suite: OpenAPI to Avro Avro to OpenAPI OpenAPI to Proto Avro to Proto Proto to Avro JSON Schema to Avro OpenAPI to JSON

100% Client-Side In-Browser OpenAPI to Apache Avro Transpiler

Compile OpenAPI 3.0, 3.1, and Swagger schemas (YAML or JSON) directly into Apache Avro (.avsc) record definitions with zero server uploads.

Pure In-Browser
Presets:
Valid OpenAPI 0 chars
Avro Generation Options
.avsc JSON 0 chars
0 records
Avro Schema Topology:
Records 0
Fields 0
Enums 0
Unions/Nullable 0

Why Use This OpenAPI to Apache Avro Converter?

100% Client-Side Privacy: Your OpenAPI manifests and Swagger definitions never leave your device.
Bilingual YAML & JSON Parsing: Accepts OpenAPI 3.0, 3.1, and Swagger 2.0 specs formatted in YAML or JSON.
Comprehensive Type Mappings: Automatically maps primitive scalars, number formats, arrays, maps, and enums.
Smart Nullable Translation: Converts optional and non-required properties into Avro nullable unions with default null.
Nested Object Records: Automatically extracts nested object structures into embedded Avro record schemas.

How to Use OpenAPI to Apache Avro Converter

1

Paste OpenAPI Definition

Paste your OpenAPI (3.0/3.1) or Swagger specification in YAML or JSON format, or choose a preset.

2

Configure Avro Namespace

Set your desired Avro namespace and select 2-space or 4-space JSON indentation.

3

Copy or Download .avsc

Review the compiled Apache Avro JSON schema, copy it to your clipboard, or export it as a .avsc file.

OpenAPI to Avro example

Demonstrates converting an OpenAPI User schema with mandatory and optional properties into an Apache Avro record.

OpenAPI Schema Source 
openapi: 3.0.3
components:
  schemas:
    User:
      type: object
      required: [id]
      properties:
        id:
          type: string
        age:
          type: integer
          format: int32
Generated Avro Schema (.avsc) Processed 
{
  "type": "record",
  "name": "User",
  "namespace": "com.example.api",
  "fields": [
    { "name": "id", "type": "string" },
    { "name": "age", "type": ["null", "int"], "default": null }
  ]
}

Technical Specifications & Engine Details

Technical specifications and engine details for OpenAPI to Apache Avro Converter
Specification Details
Supported Formats Text / Input → Rendered Result
Execution Mode 100% Client-Side In-Browser (client)
Browser Requirements Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs.
Performance Constraints Client browser memory limit (typically 1–2 GB RAM); processing speed depends on client hardware.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

Your schema files remain strictly on your local device. Zero data is transmitted to external servers.

Frequently Asked Questions

Does this tool support OpenAPI specifications written in YAML?
Yes! The parser automatically handles both YAML and JSON formatted OpenAPI and Swagger specifications.
How are non-required properties mapped to Avro?
In Avro, optional fields must be declared as unions with 'null' and provided with a 'default: null' declaration. Our engine handles this translation automatically.
How are OpenAPI enums translated?
String enums are translated into Avro enum schemas with cleaned symbol lists.
Is any API specification uploaded to a server?
No. The entire conversion runs client-side in your local browser sandbox with zero network requests.

Methodology

This tool runs entirely in your browser. The example above shows a representative input and the result it produces.

Last updated .

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