XML to Zod Schema Generator — Secure & Offline

Zod schemas built for real XML, not sanitized demos

Legacy XML is messy in specific, predictable ways: attributes and child elements share a tag, siblings repeat inconsistently between documents, and every enterprise feed carries one optional element nobody documented. This generator is built for that reality. Repeated sibling elements infer z.array() so a feed with three <item> elements and a feed with one validate against the same schema; null and empty elements infer .nullable() instead of failing inference; and mixed content — text interleaved with children — is preserved in a #text property rather than silently dropped.

The scalar rules are the ones you would write yourself if you had the patience: true and false become z.boolean() literals, round-trippable numbers become z.number(), and everything else — including 007, phone numbers, and version strings — stays z.string(), because converting those is how schemas end up rejecting the data they were built from. CDATA sections are preserved verbatim with no sniffing at all, since a CDATA block is an explicit promise that the content is text.

Attributes, namespaces, and the identifier problem

XML attributes become @-prefixed properties in the intermediate structure and renamed to valid identifiers in the generated schema — @id becomes id — with the original key recorded so the mapping back to the source document is never lost. Namespaced tags are kept exactly as written, atom:feed stays atom:feed in the intermediate value, and the generator renames them to valid Zod property names while preserving the original mapping, the same discipline the JSON tool applies to kebab-case keys.

That mapping matters more in Zod than in any other target, because Zod schemas are usually wired straight to API boundaries with .parse() at the edge. When a payload fails validation six months from now, the recorded original keys are what let you trace a failing field back to the exact attribute in the XML source — no archaeology, no guessing which element user-name came from.

A practical workflow: export one representative response from the SOAP service, paste it here, and commit the generated schema next to the client that calls the service. The next integration gets a validator instead of a wiki page, and when the upstream feed changes, the schema diff is the review artifact. Teams that do this report the same outcome — the schema becomes the contract, and the contract is finally enforced at runtime instead of in code review.

Why offline conversion matters for XML payloads with PII

SOAP envelopes and enterprise XML carry the payloads compliance teams worry about: customer records, invoice totals, internal identifiers. This converter has no upload endpoint to disable, no request that can be logged, and no account to create — the XML is parsed by your browser, in a worker thread your browser owns, and the Zod schema is generated on your machine. The page keeps working offline once loaded, which is the proof: a tool that phones home cannot work without a connection. Records with PII — names, emails, tax identifiers — are exactly what this tool is built to keep local.

The worker runs under a 3-second watchdog and a nesting-depth limit, so a pathologically nested document cannot freeze the tab — and cannot outlive the attempt. When generation fails, it fails loudly with a message, never quietly with a schema that is subtly wrong.

How do I convert XML to a Zod schema?

Paste your XML into the input pane and the Zod schema appears in the output as you type — no button, no upload. Attributes become renamed string fields, repeated elements become z.array(), and the root element name becomes the schema's exported name. Copy the result with the button or Ctrl/Cmd+Enter.

How are XML attributes handled in the Zod output?

Attributes arrive as @-prefixed properties in the intermediate value and are renamed to valid identifiers in the schema, with the original key preserved in a comment next to the field. Attribute values go through the same conservative sniffing as text: numeric and boolean-looking strings convert, everything else stays z.string() — so id="101" becomes a string field unless every instance is numeric.

What does a repeated element infer?

z.array(). If <item> appears three times in one document, the schema requires an array; the same converter fed a single occurrence infers a plain field. That is honest inference from evidence — feed the generator the richest document you have, or paste a couple of variations and merge, when you know a field always repeats.

Does it support XSD or DTD validation?

No — this tool infers from instance documents, the XML you actually exchange, not from schema definition files. DTDs are skipped during parsing. If you have a formal XSD, an XSD-aware tool encodes cardinality and type constraints this generator can only observe in samples; instance inference is the right fit when the document is the only specification you have.

Is my XML uploaded anywhere?

Never. Parsing and Zod generation run in a Web Worker inside your browser — there is no backend, nothing is logged, and the page works offline once loaded. Malformed XML produces a precise line-and-column error instead of a wrong schema, and a 3-second watchdog keeps the tab responsive on large documents.