XML to C++ Converter

XML is a attribute-rich, namespace-aware hierarchical document format — widely used for SOAP APIs, RSS/Atom feeds, Android layouts, enterprise data exchange. Converting it to strongly-typed C++ structures eliminates runtime surprises and speeds up development. This tool does it in one click, entirely in your browser.

Generate C++ structs with nlohmann/json parsing helpers for modern C++17 API integrations.

How to use this converter

1. Paste your XML into the left editor panel
2. Click Generate
3. Copy the generated C++ code from the right panel

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

Example C++ output

#include <nlohmann/json.hpp>
#include <optional>
#include <string>
 
struct Address {
    std::string city;
    std::string zip;
};
 
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(Address, city, zip)
 
struct User {
    int id;
    std::string name;
    std::optional<std::string> email;
    Address address;
};

The problem with manual XML-to-C++ mapping

C++ is a systems-level, multi-paradigm language — typed data models are central to how it works. Yet copying fields from XML payloads into C++ struct / class definitions introduces subtle errors:

• Mistyped field names cause silent deserialization failures
• Missing optional fields trigger runtime panics or null errors
• Schema drift between API and model goes undetected until production

C++ structs require manual serialization logic — this converter generates clean struct definitions that pair with libraries like nlohmann/json.

This converter eliminates the manual step entirely.

C++ and XML: what you need to know

C++ is a systems-level, multi-paradigm language, used in game engines, embedded systems, and high-performance computing. It uses struct/class based with manual serialization for structured data — making it a natural fit for XML-driven applications.

What the converter generates

Output produces C++ structs with from_json and to_json friend functions compatible with the nlohmann/json library. Optional fields use std::optional<T> and string fields use std::string.

A common gotcha

C++ lacks built-in reflection — generated code assumes nlohmann/json or a similar library for serialization.

XML input characteristics

XML allows mixed content (text + child elements), namespaces, and CDATA sections — more expressive but more verbose than JSON. XML is the foundation of many enterprise integration standards including XSLT, XSD, and SOAP.

When should I use this converter?

Use this when adding REST API consumption or config-file parsing to a C++ project, especially when the payload structure is large or deeply nested.

Common use cases

• Generating structs for REST API clients in C++ game engine tooling
• Creating typed models for embedded systems consuming JSON config files
• Producing C++ data structures for high-performance backend services
• Validating XML contract compatibility with C++ type definitions
• Generating C++ models from game engines (Unreal) API responses
• Creating typed DTOs for embedded firmware
• Rapid prototyping with real XML payloads
• Keeping C++ structs in sync when XML schemas evolve
• Onboarding new team members by auto-generating the data layer

Frequently asked questions

What version of C++ does the output target?

The converter targets modern C++ conventions — C++ structs with nlohmann/json from_json / to_json helpers. If you need output for an older version, the generated code can typically be adapted with minor changes.

Is my XML data sent to a server?

No. All conversion runs locally in your browser using client-side JavaScript. Your XML data never leaves your machine.

What XML inputs does this converter accept?

Paste any valid XML — including SOAP APIs, RSS/Atom feeds, Android layouts, enterprise data exchange. The converter infers types and generates a matching C++ model.

What serialization library does the generated C++ code assume?

The generated code is compatible with the standard C++ serialization ecosystem — C++ structs with nlohmann/json from_json / to_json helpers. No unusual dependencies required.

Related tools on LangStop

• XML Formatter & Validator
• XML to Python Converter
• XML to Go Converter
• XML to Java Converter
• XML to JSON Schema

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