XML to PropTypes Converter Online

Paste any XML and generate React PropTypes.shape() declarations. XML attributes are preserved as @_-prefixed keys (the fast-xml-parser convention) so the shape validates the JSON form of your XML losslessly — all in your browser.

Input XML

Generated PropTypes

What is an XML to PropTypes converter?

An XML to PropTypes converter takes a real XML document and emits React PropTypes.shape() declarations that describe the JSON form of that XML — typically the JSON you would get from fast-xml-parser. The OpenFormatter generator infers PropTypes.string, PropTypes.number, PropTypes.bool, PropTypes.arrayOf(), and nested PropTypes.shape() for sub-elements, preserving XML attributes as @_-prefixed keys.

XML differs from JSON in two ways your React shape has to honour. First, XML has attributes on elements (<book id="bk101">) — these become '@_id' keys inside the shape (quoted because @ is not a valid JavaScript identifier). Second, XML allows arbitrary repetition; the generator emits PropTypes.arrayOf() for repeated children with the inner shape inferred from the first occurrence.

Sample XML and the PropTypes shape it generates

Input XML

<book id="bk101" lang="en">
  <title>React PropTypes Cookbook</title>
  <year>2017</year>
  <price currency="USD">19.99</price>
</book>

Generated PropTypes

import PropTypes from 'prop-types';

export const bookPropType = PropTypes.shape({
  '@_id':   PropTypes.string,
  '@_lang': PropTypes.string,
  title:    PropTypes.string,
  year:     PropTypes.number,
  price: PropTypes.shape({
    '@_currency': PropTypes.string,
    '#text':      PropTypes.number,
  }),
});

Notice '@_id' and '@_lang' use the attribute prefix and are quoted because @ is not a valid JavaScript identifier. The nested <price currency="USD"> generates a sub-shape with '@_currency' and '#text' — exactly what fast-xml-parser produces.

How to convert XML to PropTypes — 4 steps

Paste your XML. A SOAP envelope body, an RSS feed entry, an enterprise API response — anything well-formed.
Click Convert. The browser parses the XML and generates a PropTypes.shape() for the full element tree.
Add isRequired where appropriate. The generator does not assume — append .isRequired on leaves you know are mandatory.
Attach to your component. Assign the exported shape to YourComponent.propTypes and React will warn on mismatch at render time.

PropTypes.shape

Every element becomes a PropTypes.shape() with leaf scalars (string, number, bool) and nested shapes for sub-elements — the canonical PropTypes idiom.

Attribute Prefix @_

XML attributes become @_-prefixed keys (quoted as strings) — matches fast-xml-parser output so the shape validates real component props.

Client-Side Only

Your XML — including SOAP responses with credentials — is parsed in JavaScript on your machine. Verify in DevTools: zero network requests on Convert.

Common use cases

check_circleValidate React component props sourced from a SOAP API response
check_circleType RSS or Atom feed reader components without adopting TypeScript
check_circleAdd runtime shape checks to legacy enterprise XML integrations
check_circleDocument the JSON shape of XML payloads in a Storybook addon
check_circleCatch shape drift between back-end XML and front-end consumers
check_circleBridge fast-xml-parser output to React component contracts
check_circleValidate sitemap.xml or robots.xml shapes in admin dashboards
check_circleCheck WS-Security or SAML payload shapes inside Single Sign-On UIs

Why client-side conversion matters

SOAP responses and enterprise XML often contain customer PII, API tokens, internal endpoint names, and database identifiers. Pasting them into a server-hosted converter is a compliance violation in most regulated industries. OpenFormatter parses the XML and generates PropTypes source entirely in JavaScript on your device — no upload, no logs, no cookies. Open DevTools → Network and confirm no requests fire when you click Convert.

More XML tooling

Validate, format, or convert XML to other languages — every tool runs locally in your browser.

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Frequently Asked Questions

Why React PropTypes from XML?

PropTypes from XML is a niche but real workflow — usually when a React component receives data shaped from a SOAP API response, an RSS feed, or a legacy enterprise XML payload that has been parsed via fast-xml-parser. Without PropTypes the component silently swallows shape mismatches; with PropTypes you get a console warning the moment the XML structure drifts. The generator emits the shape() declaration that mirrors the @_-prefixed JSON form of your XML.

Should I use PropTypes or TypeScript in 2026?

TypeScript is the dominant choice for new React projects and offers compile-time guarantees PropTypes can never match. PropTypes are still useful for incrementally typed JavaScript codebases, libraries that publish to consumers without TypeScript, and runtime checks at JSON-shape boundaries (e.g. validating an XML response that just hit the wire). Many teams use both.

How are XML attributes represented in PropTypes?

XML attributes become @_-prefixed string keys inside the PropTypes.shape() — matching the convention fast-xml-parser uses when it converts XML to JSON. Because @ is not a valid JavaScript identifier the key is automatically wrapped in single quotes by the generator. Access them in your component as props.book["@_id"].

Is PropTypes still maintained?

Yes — the prop-types package on npm is maintained by the React team for backward compatibility, though it was removed from the React core in React 16. New features are unlikely but security and runtime fixes still ship. For new code, plain TypeScript or zod schemas often supersede PropTypes; for existing JavaScript codebases PropTypes remain a low-friction upgrade path.

How are repeated elements like <tag> typed?

Repeated child elements become PropTypes.arrayOf() with the element shape inferred from the first occurrence. If your real data is heterogeneous across instances, use PropTypes.arrayOf(PropTypes.oneOfType([shape1, shape2])) — manual but explicit.

Does the generator emit isRequired?

No. Required-vs-optional is a domain decision the generator cannot infer from a single sample (the XML you paste might be a maximal example). Append .isRequired to any PropTypes leaf you know is mandatory — the React runtime warning fires only when isRequired is absent from a missing prop.

Is the XML I paste sent to your servers?

No. XML is parsed by the browser DOMParser and the PropTypes source is generated entirely in JavaScript on your machine. Open DevTools → Network and you will see no requests when you click Convert. Safe for SOAP responses and configuration files containing API keys or credentials.

How do I attach the generated shape to my component?

Import the exported shape and assign it to YourComponent.propTypes: import { BookPropType } from "./types"; function Book({ book }) { return <h1>{book.title}</h1> } Book.propTypes = { book: BookPropType };. PropTypes warnings will fire at component render time when the prop shape mismatches the schema.