JSON code generation / Java

Free online JSON to Java record generator

Generate Java records with Jackson annotations. Open your JSON locally, then inspect and download the generated files.

Privacy-first processing: pasted or opened JSON stays in this browser tab and is not uploaded to our servers.

Target: JavaChoose serializer and model options in the workbench

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Try the shipment response example

The editor starts empty. Load this example only if you want a small source to test the generated model.

Static example with expected output

Verified with the local schema-codegen engine.

Shipment JSON

{
  "shipment_id": "SHIP-92",
  "status": "in_transit",
  "checkpoints": [
    {
      "city": "Riga",
      "sequence": 1
    }
  ]
}

Operation

Generate Java records with Jackson property annotations.

Language: Java
Serializer: Jackson
Style: record
File layout: split files

Expected output excerpt (GeneratedRoot.java)

public record GeneratedRoot(
    @JsonProperty("checkpoints") List<GeneratedRootCheckpointsItem> checkpoints,
    @JsonProperty("shipment_id") String shipment_id,
    @JsonProperty("status") String status
) {}

Caveat: Jackson imports are generated; the consuming project still needs Jackson on its classpath.

Before using this output

Default Jackson output needs Jackson in the consuming project. Public types are emitted as separate files.

Generation analyzes the source shape; it does not validate every future input. Review the language, serializer, enum, primitive, and file-layout options before downloading.

Read the Java workflow

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