Free Online ObjGen Code Generator (Boilerplate Creator)

Generate JSON, XML, HTML, and SQL from simple indented text notation instantly.

How to use ObjGen

Write simple text notation with indentation
Use key: value for properties
Use key[] for arrays
Indent nested objects with spaces or tabs
Select output format (JSON, XML, HTML, SQL)

Keyboard Shortcuts

Ctrl+Enter Generate

Ctrl+S Download

Ctrl+Z Undo

Ctrl+Shift+Z Redo

Quick Examples

Output Format

Import Upload File

Link Copied!

History

lines

characters

keys

Valid Invalid

Simple Notation

Generated Output Generating...

Pretty Print

Copied!

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How to Use

Step-by-step guide 3 steps

1 Input Data: Paste a structured data format like JSON or XML into the input panel.
2 Select Language: Choose the target language (e.g., Swift, C#, Java, TypeScript).
3 Generate Classes: Click "Generate Code" to instantly receive the clean, native code classes/models representing your input data structure. Generate data classes now!

FAQ

Common questions 3 questions

Why do I need to generate data classes?

For API development, this quickly creates strongly-typed models that match the structure of your API payloads, reducing manual coding errors.

Does it support nested structures?

Yes, the tool automatically detects and generates separate, nested classes for complex JSON or XML hierarchies.

Is the generated code production-ready?

It provides clean boilerplate code, but you may need to add custom logic or serialization attributes.

Use Cases & Examples

Real-world applications 3 examples

API Integration

Quickly generate all client-side models (JSON to C# class) needed to consume a new REST API endpoint.

Mobile Development

Create Swift or Kotlin data structures from mock API responses in minutes.

Data Processing

Automate the creation of serialization/deserialization logic for various data formats.