Class Name:

Package:

Use Lombok

Nullable Types

JSON Input

Java 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 strongly-typed Ruby objects. Generate classes, attributes, and type definitions automatically.

According to Ruby documentation, classes and attributes make code more maintainable. Our converter analyzes your JSON structure and generates proper Ruby classes. 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.

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, package, Lombok, and nullable types in the options above.

View Generated Ruby Output

The right Ruby Output panel shows the generated Ruby classes instantly. JSON objects become classes with attr_accessor, arrays become arrays.

Download or Copy

Click Download to save the Ruby file, or Copy to copy to your clipboard. Use Clear on the input panel to start over. All processing runs in your browser.

When You'd Actually Use This

Rails Applications

Generate Ruby classes from JSON API responses for Rails. Create models or data structures for JSON-based APIs or configuration files. Perfect for Rails' JSON processing needs.

Sinatra Applications

Create Ruby classes from JSON data for Sinatra apps. Generate data models for JSON-based APIs or integrations. Perfect for Sinatra's flexible architecture.

Ruby Scripts

Generate Ruby classes from JSON data for Ruby scripts. Create data models for JSON-based data processing or automation. Perfect for Ruby scripting needs.

Code Generation

Generate Ruby code from JSON data structures. Perfect for creating data models, DTOs, or entity classes from JSON schemas or API responses.

Common Questions

Is my JSON data stored?

Nope. Everything happens right in your browser. Your JSON never leaves your computer – we don't even see it. Check out the ECMA-404 standard for more details.

How are JSON objects handled?

JSON objects become Ruby classes. Properties become class attributes, and nested objects become nested classes or references. Arrays become Ruby arrays. Check out the RFC 8259 for more details.

Can I use the generated Ruby code?

Yes. The generated Ruby code is valid and ready to use. Drop it into your Ruby project and start using it. You may want to review and refine the classes for your specific use case.

What about JSON parsing libraries?

The generated Ruby classes work with Ruby's built-in JSON library. You can use JSON.parse to convert JSON strings into these Ruby objects.

Does it work with large JSON files?

Yep. Since everything happens in your browser, it depends on your device. Small to medium JSON structures convert instantly. Really huge structures might take a few seconds.

What Ruby version is supported?

The generated code works with Ruby 2.0 and later. It uses standard Ruby features and follows Ruby conventions for maximum compatibility.

Other JSON Tools You Might Need

Conversion is just one JSON task. Here are other tools that work well together:

JSON to Java Converter