Online XML Formatter & Validator

Fast, secure, and bidirectional JSON to YAML/CSV converter with instant syntax validation.

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Output
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Introduction

Instantly beautify, properly indent, and syntax-check large XML payloads and SOAP API responses directly in your browser.

What is the XML Formatter and Why Use It?

XML (eXtensible Markup Language) is notorious for becoming an unreadable wall of text, especially when returned from legacy SOAP APIs or RSS feeds. Attempting to debug minified XML is almost impossible. Our XML Formatter Online automatically parses the tree structure of your XML, applies proper indentation, and highlights syntax issues such as missing closing tags. Executing entirely client-side, it is the safest way to format proprietary data feeds.

Key Features

  • 100% Client-Side Privacy: Parsing is executed natively by your browser's DOM parser. Your XML payloads are completely private and never logged.
  • Syntax Validation: Detects and alerts you to malformed XML, such as unescaped characters or missing angle brackets.
  • Custom Indentation: Choose between tab-based or space-based indentation (e.g., 2 spaces vs. 4 spaces) to match your team's code style.
  • Syntax Highlighting: Visual color-coding for elements, attributes, and values to make reading deeply nested nodes easier.

How to Use the XML Formatter (Step-by-Step)

  1. Step 1: Paste your unformatted or minified XML string into the editor.
  2. Step 2: Select your preferred indentation level from the options menu.
  3. Step 3: Click "Format XML" to beautify the document. Any parsing errors will be immediately displayed.

Frequently Asked Questions

Yes. We prioritize your privacy. The XML formatting logic runs purely on your device. We do not store, view, or transfer any of your data.

No, to prevent unintended data corruption, our validator will highlight the error and specify where the malformed tag is, allowing you to fix it accurately.

Yes, element tags and their inner attributes are correctly parsed, preserved, and syntax-highlighted in the formatted output.