Format, validate and minify XML. Includes a JSON → XML generator with configurable root and item element names. 100% private.
✅ Free✨ Format & Validate🔧 JSON→XML📦 Minify🔒 Private
⭐⭐⭐⭐⭐4.9 / 5(6,218 ratings)
📋XML Formatter & Generator
💡 Paste XML to format it, or use the generator below
Indent:
📋 — elements🔑 — attributes📐 depth: —📦 — bytes
📥 Input XML
📤 Formatted Output
🔧XML Generator — Build from JSON data
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Format & Validate
Uses the browser's native DOMParser to format and validate XML, catching errors with exact messages.
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JSON → XML Generator
Converts JSON arrays or objects to well-formed XML with configurable root and item element names.
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Minify
Serialises to compact single-line XML using the native XMLSerializer.
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100% Private
Uses browser-native XML APIs. Your data is never sent to any server.
⭐ User Reviews
4.9
⭐⭐⭐⭐⭐
Based on 6,218 verified reviews · 99% recommend this tool
L
Lena K.
Yesterday
⭐⭐⭐⭐⭐
The JSON → XML generator is a huge time saver for creating test fixtures. I paste a JSON array, set the root and item names, and get clean XML instantly. The element/attribute stats are great.
XML Formatter
J
James T.
3 days ago
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Native DOMParser validation catches real XML errors with proper messages — not just "something is wrong". Caught a missing closing tag in a 200-line config file instantly.
XML Formatter
M
Maya S.
1 week ago
⭐⭐⭐⭐⭐
The XML declaration toggle is a small detail that matters for SOAP and configuration XML. Most formatters don't have it. Minify output works perfectly for embedded data attributes.
XML Formatter
V
Victor B.
2 weeks ago
⭐⭐⭐⭐⭐
Best free XML formatter I've found. The attribute count and depth stats help me understand complex XML structures at a glance before writing a parser for them.
XML Formatter
📖 How to Use
1
Paste or Generate
Paste existing XML or click Generate Sample to load an example. The JSON generator accepts any JSON array.
2
Format
Click Format XML or type with Live on. The output shows indented, readable XML with element and attribute counts.
3
Validate
If the XML is invalid, the status bar shows the exact error. Fix and reformat.
4
Copy or Download
Click Copy or Download .xml for a ready-to-use file.
XML (eXtensible Markup Language) is a text format for structured data. It is used in configuration files (Maven pom.xml, Android layouts, Spring beans), data exchange (SOAP web services, RSS/Atom feeds), document formats (DOCX, XLSX are ZIP files of XML) and SVG graphics.
How does this validate XML?+
Validation uses the browser's native DOMParser with application/xml MIME type. This enforces well-formedness: matched opening/closing tags, proper attribute quoting, correct character encoding references and unique attribute names. It does not validate against an XSD schema.
What is the difference between well-formed and valid XML?+
Well-formed XML follows the basic syntax rules (matched tags, quoted attributes, single root element). Valid XML additionally conforms to a specific DTD or XSD schema. This tool checks well-formedness.
How does the JSON to XML converter work?+
Each JSON key becomes an XML element tag name, each string/number value becomes text content, arrays produce repeated elements with the item name you specify, and null values become self-closing tags.
Does it support XML namespaces?+
Yes. Namespace declarations (xmlns:prefix="uri") and prefixed elements (prefix:tagName) are preserved correctly by the native DOMParser and serialised correctly in the output.
💡 Why Use This Tool?
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100% Private
All processing runs in your browser. Your code never leaves your machine.
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Instant Results
Format, validate or generate in milliseconds with no server round-trip.
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Copy & Download
Copy output to clipboard or download as a file with one click.
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Free & No Login
Completely free, unlimited use, no account required.