What is XML Studio?

XML Studio is a workspace for reading, checking, and converting XML — the format still widely used for invoices, configuration files, data feeds, and legacy business systems. It gives you three complementary ways to look at the same document: a syntax-highlighted editor for reading and editing the raw markup, a collapsible tree that makes even a deeply nested document navigable, and a conversion view for turning it into JSON or CSV when that's what you actually need.

What can you do with it?

Editor — syntax-highlighted XML with line numbers, plus Format (pretty-print with indentation) and Minify.
Validate — malformed XML is caught immediately, with a specific error message and line/column when available.
Tree view — browse the document as a collapsible hierarchy; click any element to see its tag, attributes, text value, and full path.
XML → JSON — convert the document into a structured JSON object.
XML → CSV — convert a document with a repeated-record structure (e.g. multiple <item> elements) into a table.

How table extraction works

XML → CSV looks for the first element in the document that has several children sharing the same tag name — the "list of similar records" shape most XML data actually uses (a purchase order's line items, a feed's list of entries). Each matching child becomes one CSV row, with its attributes and child elements becoming columns. If no such structure exists — a deeply nested config file, say — XML Studio says so plainly rather than forcing an unhelpful single-row CSV.

Security: protection against XXE and malicious payloads

Parsing uses the browser's native DOMParser, which by design never fetches external DTDs or resolves external entities from script-invoked parsing — the classic XXE attack surface. XML Studio adds an explicit check on top of that: any document declaring a DOCTYPE with an ENTITY or an external SYSTEM/PUBLIC reference is rejected before parsing even begins, with a clear explanation why. Since no DTD entity processing happens at all, this also closes off internal-entity recursive-expansion ("billion laughs") payloads. There is simply no legitimate need for DTD entities in a data-parsing tool like this one.

Limitations

Documents declaring a DOCTYPE with ENTITY or external SYSTEM/PUBLIC references are rejected outright, by design — remove the DOCTYPE declaration if you need to work with that document.
XML → CSV only works on documents with an actual repeated-record structure; irregular or deeply nested documents won't convert meaningfully.
XML namespaces are preserved in tag names as written but are not specially resolved or validated against a schema.

Frequently asked questions

Can XML Studio convert any XML document to CSV?

No, and it says so honestly rather than forcing a bad conversion — XML → CSV only works when the document actually contains a repeated-record structure (like several sibling <item> elements with a similar shape). A deeply nested or irregular XML document doesn't have an obvious tabular shape, and XML Studio tells you that instead of producing a nonsensical single-row CSV.

What does XML → JSON actually produce?

A JSON object mirroring the XML structure: element names become keys, attributes are prefixed with @, text content is kept as #text when an element also has attributes or children, and repeated same-named sibling elements become a JSON array. This is the same shape that round-trips cleanly back through JSON → XML.

How does XML Studio protect against XXE and malicious payloads?

Parsing uses the browser's native DOMParser, which never fetches or resolves external entities on its own. On top of that, XML Studio explicitly rejects any document with a DOCTYPE that declares an ENTITY or references an external SYSTEM/PUBLIC identifier before parsing even begins — this also closes off internal-entity recursive-expansion ("billion laughs") payloads, since no DTD entity processing happens at all.

What kind of validation errors does it catch?

Malformed or unclosed tags, invalid nesting, malformed attributes, and invalid XML declarations — with a line/column location when the browser's parser reports one, so you know exactly where to look.

Can I explore a large or deeply nested XML document without getting lost?

Yes — the Tree view shows a collapsible hierarchy, and clicking any element shows its full path, attributes, and text value in the inspector panel on the side.

Does XML Studio upload my document anywhere?

No — parsing, formatting, validation, and conversion all happen locally in your browser using native XML APIs.