JSON Input

Ruby Output

What is JSON to Ruby Converter?

Need to generate Ruby classes from your JSON (JavaScript Object Notation) data? This tool does that instantly. Perfect for Ruby developers working with Rails, Sinatra, or Ruby scripts who need to deserialize JSON into Ruby objects. Generate model classes with proper attributes, accessor methods, and Ruby conventions automatically.

According to Ruby documentation, classes and attributes make code more maintainable. Our converter analyzes your JSON structure and generates proper Ruby classes with attr_accessor methods, instance variables, and best practices. First, validate your JSON using our JSON Validator, then convert it to Ruby. You can also format your JSON with our JSON Formatter first if needed.

Everything happens in your browser – your JSON never leaves your computer. Convert, download, and use your Ruby classes right away in your Rails applications.

How to Use JSON to Ruby

Follow these steps to convert JSON to Ruby classes. Each step uses the actual buttons and panels on this page.

Paste, Upload, or Load Sample

Paste your JSON into the left JSON Input panel, or click Upload to load a .json or .txt file. Click Sample to see example JSON. Example input:

{"subscriberId":"SUB-1001","plan":"Unlimited 5G","dataUsage":45.2,"status":"active"}

Invalid JSON will show an error. Use our JSON Validator first if unsure. Configure class name, attr_accessor, and nullable types in the options above.

View Generated Ruby Output

The right Ruby Output panel shows the generated Ruby classes instantly. Each nested object becomes its own class with proper naming. Attributes are defined as instance variables with accessor methods. The generator validates your JSON – if it's valid, it generates Ruby code; if not, you'll see an error.

Copy, Download, or Adjust

Click Copy to copy the Ruby code to your clipboard. Click Download to save as a .rb file. Need different options? Toggle attr_accessor, enable nullable types, and see the output update instantly. Use Clear to start fresh.

Common Questions

Is my JSON data stored?

No. All code generation happens in your browser using JavaScript. Your JSON data never leaves your computer.

What Ruby versions are supported?

Our converter generates code compatible with Ruby 2.5+ and works with Rails 5+. The generated code uses modern Ruby conventions with proper class definitions and accessor methods.

What is attr_accessor?

attr_accessor is a Ruby shorthand that creates both getter and setter methods for instance variables. This makes your code cleaner and more maintainable. The generated classes use this convention by default.

Can I convert complex nested JSON?

Yes. The converter handles deeply nested objects and arrays. Each nested object becomes its own class with proper Ruby naming conventions (snake_case). Arrays are properly handled with instance variables.

Can I use this with Rails?

Absolutely. This tool is designed for Rails development. The generated Ruby classes work perfectly with Rails models and can be used in your app/models directory.

How are attribute names handled?

The converter automatically converts camelCase JSON properties to snake_case Ruby attribute names, which is the Ruby convention. For example, "firstName" becomes "first_name".

Other JSON Tools You Might Need

Converting to Ruby is just one JSON task. Here are other tools that work well together: