XML Formatter & Beautifier

Q: What is an XML Formatter?

An XML Formatter is an online tool that converts minified, unreadable XML strings into a neatly organized, human-readable format. It automatically adds proper line breaks and indentation to tags, making it a perfect XML beautifier for debugging.

Q: How do I pretty print XML online securely?

To pretty print XML online, simply paste your raw XML payload into our editor. Our client-side script parses and indents the code instantly. Because it runs 100% in your browser, your sensitive API data and configurations are never uploaded to any server.

Q: Does this tool work as an XML Syntax Checker?

Yes. Before formatting, our tool parses your document using standard browser DOM parsers. If your XML has missing closing tags or invalid characters, our XML syntax checker will immediately display an error indicating exactly where the parsing failed.

Format, indent, and validate messy XML strings instantly

Why Use an Online XML Formatter?

Whether you are working with SOAP APIs, SVG graphics, or RSS feeds, XML data is often minified to save bandwidth. Our XML beautifier online tool restores the structural hierarchy making it easy for humans to read and debug.

Core Feature	How it Works	Developer Benefit
Pretty Print XML	Automatically injects line breaks before and after tags to un-minify the payload.	Makes raw XML string payloads instantly readable.
Smart Indentation	Aligns nested XML nodes using 2, 4, or 8 spaces based on depth.	Clarifies the hierarchy and tree structure of complex XML files.
XML Syntax Checker	Parses the document using standard DOM parsers before formatting.	Locates missing closing tags or invalid characters instantly.
Secure Local Execution	Processes the formatting logic entirely in your browser using JavaScript.	Guarantees privacy; your configurations are never uploaded to our servers.

Live Examples: Format XML String Online

Watch how our beautifier transforms unreadable data blocks into perfectly structured code.

Example 1: Pretty Print Minified XML

When you fetch data from a legacy API, it often arrives as a dense block. Click to format it:

Raw Minified Input

<?xml version="1.0"?><catalog><book id="bk101"><title>XML Guide</title></book></catalog>

→

Formatted Beautified Output

<?xml version="1.0"?>
<catalog>
    <book id="bk101">
        <title>XML Guide</title>
    </book>
</catalog>

Example 2: Syntax Validation

Notice the missing closing tag for <body>? Our XML validator will catch it immediately and prevent bad formatting.

Broken XML Input

  <heading>Reminder</heading>
  <body>Missing closing tag here
</note>

→

Error Detection Output

XML Parsing Error: Opening and ending tag mismatch: body line 5 and note

Example 3: Unescape XML Entities

XML from APIs often double-escapes HTML tags. Paste the input, then click the Unescape button to decode &lt; into < before formatting.

Double-Escaped XML

<log>
  <record>User input: &amp;lt;script&amp;gt;alert(1)&amp;lt;/script&amp;gt;</record>
  <record>HTML: &amp;lt;div&amp;gt;Hello&amp;lt;/div&amp;gt;</record>
</log>

→

After Unescape + Format

<log>
  <record>User input: <script>alert(1)</script></record>
  <record>HTML: <div>Hello</div></record>
</log>

Frequently Asked Questions

What is an XML Formatter?

An XML Formatter is an online tool that converts minified, unreadable XML strings into a neatly organized, human-readable format. It automatically adds proper line breaks and indentation to tags, making it a perfect XML beautifier for debugging code.

How do I pretty print XML online securely?

To pretty print XML online, simply paste your raw XML payload into our editor. Our client-side script parses and indents the code instantly. Because it runs 100% in your browser, your sensitive API data and configurations are never uploaded to any server.

Does this tool work as an XML Syntax Checker?

Yes. Before formatting, our tool parses your document using standard browser DOM parsers. If your XML has missing closing tags or invalid characters, our XML syntax checker will immediately display an error indicating exactly where the parsing failed.