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JSON to Pike Converter

JSON is a lightweight, human-readable key-value format — widely used for REST API responses, configuration files, NoSQL documents. Converting it to strongly-typed Pike structures eliminates runtime surprises and speeds up development. This tool does it in one click, entirely in your browser.

Generate Pike mappings and typed class definitions for Pike-based web and scripting applications.

How to use this converter

  1. Paste your JSON into the left editor panel
  2. Click Generate
  3. Copy the generated Pike code from the right panel

No account. No upload. No tracking. Runs entirely in your browser.

Example Pike output

class Address {
  string city;
  string zip;
 
  void create(mapping data) {
    city = data->city;
    zip  = data->zip;
  }
}
 
class User {
  int id;
  string name;
  string|zero email;
  Address address;
 
  void create(mapping data) {
    id      = data->id;
    name    = data->name;
    email   = data->email;
    address = Address(data->address);
  }
}

Why automate JSON-to-Pike conversion?

Writing Pike class / mapping definitions by hand from JSON is:

  • Tedious — especially for deeply nested or large JSON payloads
  • Inconsistent — naming conventions drift when done manually across a team
  • Fragile — when the JSON schema changes, hand-written models lag behind

Pike's mapping type is a flexible hash-map that can represent arbitrary JSON-like structures natively.

This converter handles all of that automatically, giving you idiomatic Pike code that matches your JSON structure exactly.

Pike and JSON: what you need to know

Pike is a dynamic, interpreted, C-like syntax language, used in Roxen web server and specialized server-side applications. It uses mapping and class based for structured data — making it a natural fit for JSON-driven applications.

What the converter generates

Output produces Pike class definitions with typed member variables and create() constructors. Uses Pike's native type system with string, int, float, and mapping types.

A common gotcha

Pike uses dynamic typing by default — explicit type declarations are optional but improve performance and readability.

JSON input characteristics

JSON supports nested objects, arrays, strings, numbers, booleans, and null. Tools like jq, Postman, and browser DevTools make JSON the most developer-friendly data exchange format.

When should I use this converter?

Use this when working on Pike-based web applications or scripts that need structured, typed models from external data sources.

Common use cases

  • Generating typed classes for Roxen or Caudium web server modules
  • Creating model definitions for Pike-based data processing scripts
  • Producing typed structures for Pike applications consuming REST APIs
  • Rapid prototyping with real JSON payloads
  • Keeping Pike structs in sync when JSON schemas evolve
  • Onboarding new team members by auto-generating the data layer
  • Validating JSON contract compatibility with Pike type definitions
  • Generating Pike models from Roxen CMS API responses
  • Creating typed DTOs for Pike-based server applications

Frequently asked questions

Does this converter support JavaScript Object Notation namespaces and nested structures?

Yes. JSON is natively parsed by all major runtimes — no schema required to begin parsing. The parser handles deeply nested structures and generates matching nested Pike class / mapping definitions.

How are optional fields handled in the Pike output?

Fields that may be absent or null in your JSON are marked as optional in the generated Pike code. Note: Pike uses dynamic typing by default — explicit type declarations are optional but improve performance and readability.

Can I use the output directly in a Roxen CMS project?

Yes. The generated Pike code follows idiomatic patterns for Roxen CMS — you can copy it directly into your project.

Does this work for large JSON payloads?

Yes. The converter is optimized for large and deeply nested JSON structures, running entirely in the browser without page reloads or server round-trips.

Related tools on LangStop

If you work frequently with JSON and Pike, bookmark this page to skip the manual model-writing step entirely.