XML to Elm Converter

Working with XML data and need Elm models fast? XML supports both element content and attributes — this converter handles both when generating typed models. This free, browser-based converter parses your XML and generates clean, production-ready Elm code — no account required.

How to use this converter

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

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

Why automate XML-to-Elm conversion?

Writing Elm type alias / type definitions by hand from XML is:

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

Elm decoders are composable and explicit — this converter generates type-safe Decoder pipelines that handle missing fields gracefully.

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

Elm and XML: what you need to know

Elm is a purely functional, strongly typed language, used for reliable frontend applications with no runtime exceptions. It uses record and custom type based with elm/json decoders for structured data — making it a natural fit for XML-driven applications.

What the converter generates

The output consists of Elm type alias records with explicit Decoder definitions. This is the idiomatic pattern for Elm data models, compatible with popular Elm serialization libraries.

A common gotcha

Elm decoders must be explicitly composed — any missing field decoder causes a compile error, not a runtime crash.

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.

Common use cases

• Generating Elm models from reliable SPAs API responses
• Creating typed DTOs for data-driven frontends
• Rapid prototyping with real XML payloads
• Keeping Elm structs in sync when XML schemas evolve
• Onboarding new team members by auto-generating the data layer
• Validating XML contract compatibility with Elm type definitions

Frequently asked questions

Can I use the output directly in a reliable SPAs project?

Yes. The generated Elm code follows idiomatic patterns for reliable SPAs — you can copy it directly into your project.

Does this work for large XML payloads?

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

Does this converter support eXtensible Markup Language namespaces and nested structures?

Yes. XML supports both element content and attributes — this converter handles both when generating typed models. The parser handles deeply nested structures and generates matching nested Elm type alias / type definitions.

How are optional fields handled in the Elm output?

Fields that may be absent or null in your XML are marked as optional in the generated Elm code. Note: Elm decoders must be explicitly composed — any missing field decoder causes a compile error, not a runtime crash.

Related tools on LangStop

• XML Formatter & Validator — https://langstop.com/xml-formatter
• XML to TypeScript Converter — https://langstop.com/xml-to-typescript
• XML to Python Converter — https://langstop.com/xml-to-python
• XML to Go Converter — https://langstop.com/xml-to-go
• XML to JSON Schema — https://langstop.com/xml-to-json-schema

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