XML Formatter

What is an XML Formatter?

An XML formatter takes compact or inconsistently indented XML and re-prints it with one element per line and indentation that reflects the document's nesting. XML (Extensible Markup Language) remains central to configuration files, SOAP web services, RSS feeds, SVG graphics, Office documents, and countless enterprise systems — and like JSON, it is often delivered minified.

Our XML Formatter tokenizes the markup, tracks element depth, and rebuilds the document with clean indentation. It also runs a well-formedness check using the browser's native XML parser so you immediately know whether the structure is valid.

How to Format XML

• Paste your XML, or click Sample to load an example document
• Choose your indentation: 2 spaces, 4 spaces, or tabs
• The formatted, nested output appears instantly alongside a validity status
• Open and close tags are aligned by depth so structure is obvious at a glance
• Click Copy to copy the beautified XML to your clipboard

Well-Formed vs Valid XML

This tool checks that your XML is well-formed — meaning every tag is properly closed and nested, attributes are quoted, and there is a single root element. Well-formedness is the baseline requirement for any XML document and is what most parsers enforce.

Well-formedness is distinct from schema validity (conformance to a DTD or XSD), which checks the document against a specific set of rules. If your XML is not well-formed, the tool reports the parser error so you can correct the structure before worrying about schema rules.

Common Use Cases

Developers format XML when debugging SOAP API responses, editing configuration and build files, inspecting RSS or Atom feeds, cleaning up exported SVG, and reading machine-generated XML that arrives as a single unreadable line. A properly indented document makes nesting errors and missing tags far easier to spot. All processing happens locally in your browser for complete privacy.

Key Features

• Re-indents minified or messy XML into clean, nested structure
• Well-formedness check using the browser's native XML parser
• Indentation options — 2 spaces, 4 spaces, or tabs
• Clear parser error messages pinpointing structural problems
• One-click copy of the formatted XML
• 100% browser-based — your XML never leaves your device

Where XML Is Still Essential

Although JSON has taken over much of the web, XML remains deeply embedded in many systems and is far from obsolete. SOAP web services, which power a great deal of enterprise and financial software, are built entirely on XML. RSS and Atom feeds that syndicate news and podcasts are XML, as are sitemaps that tell search engines about your pages. Office documents in the .docx, .xlsx, and .pptx formats are really zipped collections of XML files, and SVG vector graphics are an XML-based format.

XML also underpins configuration and build files across the software world — Android layouts, Maven and Ant build scripts, and countless application config files. Because so much of this XML is generated by machines and delivered as a single dense line, a formatter that re-indents it into a readable, nested structure is an everyday necessity for anyone integrating with these systems, not a niche convenience.

Why Choose Our XML Formatter?

This XML formatter is completely free, needs no signup, and runs entirely in your browser. Your XML — which may contain internal endpoints, configuration, or proprietary data — is never uploaded to a server, so it is safe to format confidential documents. The tool both beautifies and checks well-formedness, so you get readable output and an immediate signal if the structure is broken.

The XML Formatter is one of more than 200 free tools on ToopTools. If you work with XML, feeds, or SOAP APIs regularly, you can pin it to your personalized My Workspace workspace so it stays beside your other developer utilities, always one click away. It works on any modern browser, on desktop and mobile.

Is the XML formatter free?

Yes. It is completely free with no limits and no signup. You can format and validate as much XML as you like, as often as you like, without ever creating an account.

Does it check whether my XML is valid?

It checks that your XML is well-formed — that every tag is properly closed and nested, attributes are quoted, and there is a single root element — using the browser's native parser. If the structure is broken, it reports the error so you can fix it. Well-formedness is distinct from schema validation against a DTD or XSD.

Can I choose the indentation?

Yes. You can format with 2 spaces, 4 spaces, or tabs to match your project's style, and the nested output updates instantly when you change the setting.

Will it handle large XML documents?

Yes. The formatter handles large files well. Because all processing happens locally on your device, very large documents simply take a moment longer to format and render.

Is my XML kept private?

Completely. All formatting and validation happens locally in your browser, so your XML is never uploaded, logged, or stored on a server. It is safe to use with confidential documents.

Common Situations Where Formatting XML Helps

Developers most often reach for an XML formatter when debugging a SOAP API response that arrives as a single unreadable line, when inspecting an RSS or Atom feed to understand its structure, or when cleaning up SVG exported from a design tool. In each case, the raw XML is technically correct but visually impenetrable, and indentation instantly reveals the nesting and the element you actually care about.

It is equally useful for configuration and build files, where a missing or misplaced tag can break an entire application. Formatting the document makes structural mistakes — an unclosed element, a tag nested at the wrong level, a stray character — far easier to spot than scanning a wall of compressed markup. Whether you are integrating with a legacy enterprise system or just trying to read machine-generated output, a quick format turns guesswork into clarity.

How do I beautify minified XML?

Paste your minified or messy XML and the tool instantly re-indents it with consistent spacing and line breaks so the structure is easy to read. Choose your indentation, then copy the formatted result. It validates as it formats and flags any errors.

Does the XML formatter work offline?

Yes. Formatting and validation run entirely in your browser, so once the page has loaded the tool works without an internet connection and your XML is never uploaded — safe for configuration and data files containing sensitive values.