Convert XML to Kotlin online, free. XML is a verbose, self-describing markup format used in SOAP, RSS and enterprise systems. Kotlin data classes model structured data with null-safety. XML to Kotlin conversion parses your XML against the W3C XML 1.0 grammar (https://www.w3.org/TR/xml/), builds an in-memory model of its keys, nested objects and arrays, then emits ready-to-use Kotlin types as data classes with nullable types following the Kotlin docs conventions. Processing runs in your browser in JavaScript with no upload or server round-trip — no size limit beyond your device's memory, so multi-megabyte documents convert in milliseconds and sensitive payloads never leave your machine. Typical uses include Android apps, Ktor services and kotlinx.serialization.
It maps the full structure of your XML onto idiomatic Kotlin types, following the Kotlin docs conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste XML and generate Kotlin types from Kotlin immediately. Conversion runs client-side, so there is no upload wait and large documents stay fast.
Nested XML objects, tables and arrays are mapped faithfully onto Kotlin, including nested types and optional fields.
Your XML never leaves your device — everything is processed locally in JavaScript, with nothing logged or stored.
Unlimited conversions with no account, no quotas, and no watermark. Works on desktop and mobile.
A XML document and its Kotlin equivalent:
XML input:
<product>
<sku>A-100</sku>
<price>19.99</price>
<active>true</active>
</product>Output:
@Serializable
data class Product(
val sku: String,
val price: Double,
val active: Boolean,
)Paste your XML into the editor and press "Convert to Kotlin". The tool parses it against the W3C XML 1.0 grammar, then generates Kotlin types following Kotlin docs conventions — instantly and entirely in your browser. You can validate or format the XML first to be sure it is clean.
XML has no native numbers, booleans or arrays. Repeated child elements become lists in Kotlin, attributes and element text become fields, and values stay strings unless Kotlin coerces them — so review numeric or boolean fields after converting.
Optional or nullable members in the generated Kotlin are inferred from keys missing in some records of your XML, following Kotlin docs. Include the optional fields in your sample so they are typed correctly.
XML (eXtensible Markup Language) (XML) — XML is a verbose, self-describing markup format used in SOAP, RSS and enterprise systems. Kotlin data classes (Kotlin) — Kotlin data classes model structured data with null-safety. This converter maps the structure of your XML onto Kotlin so you can use it for Android apps.
Yes. Invalid XML is flagged with a clear error before anything is converted. Common XML problems to check are matched start and end tags, a single root element, and quoted attribute values. Starting from clean input keeps the generated Kotlin accurate.
Yes. The entire XML-to-Kotlin conversion runs locally in your browser in JavaScript — your XML is never uploaded, logged or stored. That matters when the data is something like SOAP web services, which should not leave your machine.
The generated Kotlin is ready for Android apps, Ktor services and kotlinx.serialization. Copy or download it and drop it straight into your codebase.
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