What Avro features are generated?

The tool generates Avro schemas with record types, proper field types (string, int, long, double, boolean, arrays, nested records), and union types for nullable fields.

Does it support nullable fields?

Yes, nullable fields are represented using Avro union types ["null", "type"].

Can I use this with Kafka?

Yes, the generated Avro schema is compatible with Apache Kafka for topic message serialization.

JSON to Avro - Online Apache Avro Schema Generator

JSON to Avro

Convert JSON data to Apache Avro Schema (.avsc format) with record, enum, array, and union type mapping.

Schema Name

JSON Input

Avro Schema Output

How to Use

Paste your JSON data into the left input box.
Optionally modify the schema name (default is Model).
Click the "Convert" button to generate Avro Schema.
Click "Copy Result" to copy the output to your clipboard.

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About JSON to Avro

This tool helps you quickly convert JSON data to Apache Avro Schema (.avsc format). Avro is a language-neutral data serialization format widely used in the Apache big data ecosystem including Kafka, Spark, and Hadoop. Writing Avro schemas manually is tedious and error-prone. This tool automatically generates accurate schema definitions.

Simply paste JSON data and the tool will automatically analyze the JSON structure and generate corresponding Avro Schema definitions. Supports record types, enum types, array types, union types (nullable fields), and int/long/float/double/boolean/string primitive type mapping to help you quickly build Avro data models.