JSON to Scala Case Class Converter - Generate Scala Models Online

Online JSON to Scala Case Class Converter: Generate Models Instantly

Simplify your Scala development with our JSON to Scala Case Class tool. In the Scala ecosystem, Case Classes are the standard way to represent data models. However, manually defining these classes—especially for complex, nested JSON responses—is time-consuming. This tool allows you to paste a JSON sample and instantly generate clean, production-ready Scala Case Classes, ready to be used with libraries like Circe, Play JSON, or ZIO JSON.

Why Convert JSON to Scala Case Classes?

Scala is a powerful, statically typed language. To work with data effectively, you need strong types that reflect your JSON structure.

Enhance Development Speed

Manually mapping a JSON response with dozens of fields is a bottleneck. Our converter handles the heavy lifting, generating the entire hierarchy of case classes in milliseconds. This is particularly useful for Data Engineers working with Apache Spark or Backend Developers building Akka/Pekko microservices.

Leverage Type Safety

By converting JSON into Case Classes, you gain the full power of Scala's compile-time type checking. This prevents runtime errors and ensures that your application handles missing or malformed data gracefully according to the types you've defined.

Key Features of Our Scala Case Class Tool

Our converter is designed to follow Scala best practices and support the most popular functional programming libraries.

1. Precise Scala Type Mapping

The engine analyzes your JSON values to infer the most accurate Scala types:

• "text" → String

• 123 → Int or Long

• 12.34 → Double or BigDecimal

• true → Boolean

• null → Option[Any]

• [] → List[T] or Seq[T]

2. Recursive Nested Class Support

If your JSON contains nested objects, our tool doesn't just return a generic Map. It recursively generates separate Case Classes for every sub-object. This keeps your code modular, readable, and perfectly structured.

3. Compatibility with JSON Libraries

The generated code is designed to be easily annotated for major Scala JSON libraries:

• Circe: Add deriveConfiguredCodec or deriveDecoder.

• Play JSON: Ready for Json.format[YourClass].

• ZIO JSON: Compatible with @jsonMember annotations.

How to Use the JSON to Scala Converter

1. Paste your JSON: Insert your raw JSON payload into the input editor.

2. Naming: (Optional) Set the name for your root case class (e.g., UserResponse or DataModel).

3. Choose Collection Type: Select whether you prefer List, Seq, or Vector for arrays.

4. Copy and Use: Click "Copy" to take the generated code and paste it into your .scala files.

Technical Insights: Idiomatic Scala Mapping

PascalCase for Classes, camelCase for Fields

Our tool automatically handles naming conventions. It converts JSON keys into idiomatic Scala camelCase property names while preserving the structural integrity required for deserialization.

Handling Optional Fields

In the world of JSON, fields are often missing or null. Our tool identifies these instances and automatically wraps the type in a Scala Option[T], ensuring you handle data presence safely using map, flatMap, or pattern matching.

Frequently Asked Questions (FAQ)

Is this tool compatible with Scala 3?

Yes! The generated Case Classes use standard Scala syntax compatible with both Scala 2.13 and Scala 3.

Can it handle arrays of mixed types?

When an array contains multiple types, the tool defaults to List[Any] or List[Json] (if using a specific library mode) to ensure the code compiles while highlighting the data inconsistency.

Is my data secure?

Absolutely. All conversion logic is performed locally in your web browser. Your JSON data is never sent to our servers, keeping your API structures 100% private and secure.