JSON Schema to Apache Avro Converter
Convert JSON Schema definitions into strongly typed Apache Avro (.avsc) record schemas in your browser.
At a glance
JSON Schema to Apache Avro Converter translates JSON Schema models into Apache Avro Schema (.avsc) record definitions. It accurately translates primitive types, logical formats like timestamp-millis and uuid, optional union fields, nested records, and maps into valid Avro specifications in browser memory.
100% Client-Side In-Browser JSON Schema to Apache Avro Converter
Convert JSON Schema (Draft-04 to 2020-12) models directly into strongly typed Apache Avro (.avsc) record definitions in browser memory.
Generation Options
date-time → timestamp-millis, uuid → uuid logical type, additionalProperties → map, and optional non-required properties → ["null", type].
Why Use This JSON Schema to Apache Avro Converter?
How to Use JSON Schema to Apache Avro Converter
Paste JSON Schema Definition
Enter your JSON Schema JSON or drop a .json schema file into the editor.
Configure Avro Settings
Customize Avro namespace, fallback root record name, and toggle logical type mappings.
Copy or Download Avro Schema
Review generated .avsc Avro schema, copy to clipboard, or export as a .avsc file.
JSON Schema to Apache Avro Conversion example
Converts JSON Schema User model into a strongly typed Avro record schema with timestamp-millis logical type, nullable union types, and default null attributes.
{
"title": "User",
"type": "object",
"required": ["id", "username"],
"properties": {
"id": { "type": "integer", "format": "int64" },
"username": { "type": "string" },
"createdAt": { "type": "string", "format": "date-time" },
"bio": { "type": "string" }
}
}
{
"type": "record",
"name": "User",
"namespace": "com.example",
"fields": [
{
"name": "id",
"type": "long"
},
{
"name": "username",
"type": "string"
},
{
"name": "createdAt",
"type": [
"null",
{
"type": "long",
"logicalType": "timestamp-millis"
}
],
"default": null
},
{
"name": "bio",
"type": [
"null",
"string"
],
"default": null
}
]
}
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | APPLICATION/JSON, APPLICATION/SCHEMA+JSON, TEXT/PLAIN, .JSON → APPLICATION/JSON, APPLICATION/AVRO, TEXT/PLAIN, .AVSC |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Modern browser with JavaScript enabled. |
| Performance Constraints | Runs client-side in browser memory. Performance and file limits are bounded by available local device RAM. |
100% Client-Side Privacy Guarantee
Your files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
Are my JSON schemas uploaded to an external server?
How are optional fields represented in Avro?
Which JSON Schema drafts are supported?
How are date-time format strings converted in Avro?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .