XML to C++
Paste any XML document and instantly get matching C++ struct definitions with inferred types, nested structs, and std::vector for repeated elements.
Example
Input XML:
<book id="1" inStock="true">
<title>Holes</title>
<pages>233</pages>
<price>8.50</price>
</book>
Generated C++:
#include <string>
#include <vector>
struct Root {
int id;
bool inStock;
std::string title;
int pages;
double price;
};How it works
The tool parses your XML with the browser's DOMParser, walks the element tree to build a type model (merging attributes and child elements, detecting repeated tags as arrays), and emits C++ structs named after the tags with the root type called Root.
Good to know
XML to C++ turns a sample XML document into ready-to-paste C++ struct definitions, inferring a field type for every element and attribute and wiring nested tags into their own nested structs. It is aimed at C++ developers who need to deserialize a config file, an API response, or a legacy data feed and want a typed starting point instead of hand-writing each struct from a schema-less sample.
Reach for it when you have example XML but no XSD or generated bindings, or when you just want to sketch the shape of the data before deciding on a parsing library. Because everything runs in the browser, you can paste internal or sensitive XML without it leaving your machine, which makes it safe for proprietary payloads that you would not paste into a remote converter.
To read the output: the root element always becomes a struct called Root, attributes and child elements both become fields, and a tag that appears more than once under the same parent becomes a std::vector<T>. Scalar types are guessed from the actual values using a widening order, so bool < int < long long < double < std::string — if two occurrences of the same field disagree, the converter picks the wider type, and anything it cannot classify falls back to std::string.
A practical caveat: the type model is only as good as the sample you feed it. Provide examples that include every optional field and at least two entries of any repeated element so the merge step captures real variation; a single book in the sample will not be detected as a vector even if the real feed has many. Also remember the tool emits plain structs, not parsing code or serialization, and field names are sanitized to valid C++ identifiers, so C++ keywords and names that start with a digit get adjusted automatically.
Frequently asked questions
How are repeated XML elements handled?
When a tag appears more than once under the same parent (for example multipleelements), it becomes a std::vector of the inferred element type, and the per-element types are merged so the struct fits every occurrence.
How are XML attributes converted?
Attributes become scalar fields on the struct for that element, with their type inferred from the value (int, long long, double, bool, or std::string). Namespace declarations like xmlns are skipped.
Is my data uploaded anywhere?
No — this tool runs entirely in your browser. Your input never leaves your device and it works offline once loaded.
Is it free?
Yes, completely free with no sign-up and no limits.
People also ask
Does the XML to C++ converter generate parsing code or just the structs?
It generates only the struct definitions plus the needed includes (<string> and <vector>). It does not produce serialization or deserialization code, so you still pair the structs with an XML parser such as pugixml, RapidXML, or TinyXML-2 to populate them.
How does it decide between int, long long, and double?
It inspects each value's text. Whole numbers that fit in 32 bits become int, larger whole numbers become long long, and numbers containing a decimal point or exponent become double. Values it cannot classify, including empty text, default to std::string.
What happens to nested XML elements?
Each element that has its own child elements or attributes becomes a separate nested struct, named after its tag in CamelCase, and the parent gets a field of that struct type. Deeply nested XML produces a corresponding tree of structs.
How are XML element text values with both attributes and text handled?
When an element carries attributes and also has non-empty text content, the attributes become fields and the text is stored in an added field named value, so neither piece of data is lost.
Why is my repeated element not turning into a std::vector?
Repetition is detected from the sample you paste. A tag only becomes a std::vector when it appears more than once under the same parent in your input, so include at least two occurrences if the real data can repeat.
Does it handle XML namespaces and prefixes?
Namespace declarations such as xmlns and xmlns: attributes are skipped rather than turned into fields. Other prefixed names are passed through the identifier sanitizer, which replaces characters like the colon with underscores.
Is the generated C++ code standard and compiler-independent?
Yes. It emits portable standard-library types (std::string, std::vector) and plain structs with no third-party dependencies, so the definitions compile under any standards-compliant C++ compiler.
What if my XML is invalid or empty?
The tool uses the browser's DOMParser and reports a parse error or a missing-root-element message instead of producing output. Fix the malformed markup and re-run, and it will show how many structs were generated on success.
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