XML Formatter

Indent, pretty-print, and check your XML for quick readability and confidence

Input

Output

What is XML Formatter?

Ever opened an XML file and found yourself staring at one endless wall of tags? We have all been there—trying to make sense of a minified SOAP envelope or a config file that someone saved without any line breaks. XML Formatter takes that tangled mess and turns it into clean, properly indented markup you can actually read.

We built this because manually adding indentation to XML, or loading it into a heavyweight IDE just to see the tree structure, gets old fast. Whether you are debugging a web service response, reviewing a build manifest, or learning how elements nest, this tool does the heavy lifting. Paste your XML on the left and watch it transform into neatly formatted markup on the right. If you want the underlying rules, the W3C XML 1.0 specification is the authority, and MDN's XML introduction is a friendlier starting point.

How to Use XML Formatter

  1. Paste or Upload Your XML – Copy your XML and paste it into the input panel, or click the "Upload" button to load an .xml file from your computer.
  2. Auto-Format – The tool formats and well-formedness-checks your XML the moment you paste it. No button to press—it just works.
  3. Review the Output – See your XML properly indented in the output panel, with each element on its own line and clear nesting.
  4. Copy or Download – Click "Copy" to put the formatted XML on your clipboard, or hit "Download" to save it as an .xml file.
  5. Minify When Needed – Use the "Minify" button to collapse your XML back into a single line—handy for transport over the wire or embedding in a payload.

Pro Tip: Use Ctrl+V (Cmd+V on Mac) to paste straight into the editor. Formatting happens instantly, and any syntax problem is flagged right away.

Example

A typical telecom provisioning payload: a cramped one-line XML document on the left, the same record pretty-printed on the right.

Minified → Pretty-printed Format
subscriber.xmlXML · 1 line
<?xml version="1.0" encoding="UTF-8"?><subscriber id="SUB-1001"><msisdn>447700900142</msisdn><imsi>234105811234567</imsi><iccid>8944110012345678901</iccid><plan>Unlimited 5G</plan><apn>internet.mno.com</apn><roaming>false</roaming></subscriber>
subscriber.xmlXML · 7 lines
<?xml version="1.0" encoding="UTF-8"?>
<subscriber id="SUB-1001">
  <msisdn>447700900142</msisdn>
  <imsi>234105811234567</imsi>
  <iccid>8944110012345678901</iccid>
  <plan>Unlimited 5G</plan>
  <apn>internet.mno.com</apn>
  <roaming>false</roaming>
</subscriber>

Common Use Cases

Debugging SOAP and API Responses

Many enterprise and telecom systems still speak SOAP, and those envelopes arrive as one continuous string. Trying to find a single field by eye is painful. Format it here and you can instantly see where the body starts, which namespaces are in play, and whether a fault element is hiding inside. For a refresher on the envelope structure, the W3C SOAP specification lays it all out.

Reviewing Configuration Files

Build tools, app servers, and SIM provisioning systems lean heavily on XML config. Before you commit a change, paste the file here. Indented markup makes a misplaced closing tag or a stray attribute jump out immediately. Once both the old and new versions are formatted the same way, an online text comparison tool makes it trivial to see exactly which elements actually changed.

Learning and Teaching XML

If you are new to XML or explaining it to someone else, indentation makes nesting obvious. Use this tool to show what well-formed XML looks like and how elements, attributes, and text content fit together. For structured tutorials, W3Schools' XML tutorial walks through the basics step by step.

Frequently Asked Questions

Is my XML data safe when I use this tool?

Yes. All formatting happens entirely in your browser using the native DOMParser—your XML never gets uploaded to any server or stored anywhere. It stays on your device, so privacy is complete.

What happens if my XML has errors?

The formatter relies on the browser's XML parser, which is strict about well-formedness. If a tag is unclosed, an attribute is unquoted, or the document has no single root element, you will see an "Invalid XML" message instead of formatted output. Fix the structure and it will format cleanly. If you need help, Stack Overflow's XML tag covers thousands of common problems.

Does formatting change the meaning of my XML?

No. Formatting only adds indentation and line breaks between elements. The element names, attributes, and text content are preserved exactly. Reserved characters like & and < stay encoded the way they were.

What's the difference between formatting and minifying?

Formatting (beautifying) adds whitespace so the markup is easy for humans to read. Minifying strips the whitespace between tags so the document is as small as possible—useful for transport, storage, or embedding in another payload.

Does this work on mobile devices?

Yes. The tool is fully responsive and works on phones and tablets. The two panels stack vertically on small screens, so you can format XML on the go.

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