How do I know if my XML is valid?

Paste XML into the left editor or import an `.xml` file. If the XML is valid, the formatted result appears on the right. If not, the tool shows an Invalid XML warning and, when available, line and column details to help you fix the exact issue faster.

Can I convert XML to JSON?

Yes. Switch the output mode to JSON and the tool will parse your XML and convert it into structured JSON instantly. Attributes are preserved, repeated sibling tags become arrays, and text nodes are kept so you can inspect the data clearly.

Does this support minifying XML too?

Yes. Turn on Minify to generate compact one-line output. In XML mode it removes unnecessary spacing between tags, and in JSON mode it outputs compressed JSON for smaller files or quick transport.

Can I use tabs or different indentation sizes?

Yes. In pretty-print mode you can format with 2 spaces, 4 spaces, or tabs. This makes it easy to match your project’s coding style or team conventions.

Is my XML uploaded or stored anywhere?

No. Everything runs locally in your browser. Your XML is parsed, formatted, and converted client-side, so nothing is uploaded to a server.

XML Formatter & Validator - Free Online Tool

XML formatting and validation without leaving your browser

XML is still everywhere: APIs, data feeds, configuration files, exports from enterprise software, product catalogs, sitemaps, RSS feeds, and document workflows. But raw XML is often hard to read, easy to break, and frustrating to debug when indentation collapses or a single missing closing tag invalidates the entire file.

This tool helps you validate XML, format it into clean readable structure, minify it for compact output, and convert XML to JSON instantly—right in your browser.

No uploads, no server-side processing, and no extra setup.

What this XML tool can do

Use it to:

Validate XML and catch parsing errors before they break your workflow
Pretty-print XML with clean indentation for easier reading and editing
Minify XML by removing unnecessary whitespace between tags
Convert XML to JSON for debugging, API work, or transforming legacy data
Import .xml files from your device or drag and drop them directly into the page
Copy or download the formatted result instantly
Compare input and output size with byte and line counts

Whether you are cleaning up a sitemap, checking API payloads, reviewing a feed export, or converting older XML data into a JSON-friendly format, this tool is designed to make the process fast and frictionless.

Workflow

1. Paste, type, or import XML

You can:

paste XML directly into the left editor
type or edit manually
drag and drop an .xml file onto the page
use Import to load a file from your device
load the built-in Sample XML to test formatting and conversion quickly

The left editor updates live, so you can fix syntax issues and immediately see the result.

2. Choose the output mode

Pick the result you want:

Output in XML → validate and pretty-format XML
Convert to JSON → parse the XML structure and transform it into JSON

This makes the tool useful both as an XML beautifier and as a quick XML-to-JSON converter.

3. Adjust formatting options

You can control:

Indentation: 2 spaces, 4 spaces, or tabs
Minify: generate compact one-line output instead of pretty formatting

When Minify is enabled, indentation is disabled because the tool outputs the most compact version possible.

4. Copy or download the result

Once the output is ready, you can:

use Copy to place the result on your clipboard
use Download to save the formatted output as .xml, .min.xml, .json, or .min.json

This is useful when you want a cleaned file ready for documentation, code repositories, APIs, or handoff to another tool.

Why XML breaks so often

XML is strict by design. That is useful for machines, but it also means small mistakes can invalidate the whole document.

Common XML issues include:

Missing closing tags

A tag like this:

<item>
  <name>Keyboard</name>

is invalid because <item> was never closed.

Mismatched tags

This will fail parsing:

<name>Keyboard</title>

The opening and closing tags must match exactly.

Invalid nesting

XML elements must be properly nested. You cannot close a parent before a child.

Invalid:

<a><b></a></b>

Valid:

<a><b></b></a>

Unescaped special characters

Reserved characters like <, >, and & inside text content must be escaped when they are not part of markup.

Example:

<message>Tom &amp; Jerry</message>

Broken attribute syntax

Attributes must be quoted correctly:

<item id="101" available="true">

A missing quote can make the whole file invalid.

Practical uses for an XML formatter

API payload inspection

Many older and enterprise APIs still return XML. Formatting the response makes it easier to:

inspect nested nodes
verify element names
check attributes and text values
understand namespaces and structure before mapping data

Sitemaps and feeds

XML is commonly used for:

sitemap.xml
RSS and Atom feeds
product or inventory feeds
marketplace imports and exports

Pretty-printing helps you spot malformed entries, duplicate structures, and missing data faster.

Configuration and integration files

XML still appears in:

app config files
ERP or POS exports
import templates
legacy software integrations
document workflows and metadata files

Formatting these files before editing reduces the risk of accidental errors.

XML to JSON transformation for modern workflows

If you need to use XML data in JavaScript-heavy tools, APIs, or modern apps, converting XML to JSON makes the structure easier to consume and inspect.

This is especially useful when:

debugging API integrations
transforming feeds into app-friendly data
understanding a legacy XML schema before rebuilding it elsewhere

XML vs JSON: when conversion helps

XML and JSON both represent structured data, but they are optimized for different ecosystems.

XML is strong when you need:

explicit document structure
attributes and nested metadata
namespaces
compatibility with older systems and document standards

JSON is strong when you need:

lighter payloads for web apps
easier JavaScript integration
faster inspection in modern frontend workflows
simpler object-based processing

That is why converting XML to JSON can be so helpful: you keep the structure, but move it into a format that is easier to work with in modern development environments.

How this XML to JSON conversion works

When you switch to JSON mode, the tool:

Parses your XML using the browser’s XML parser
Validates that the document is syntactically correct
Reads the root element and its children
Preserves attributes as object keys
Converts repeated sibling elements into arrays
Preserves text content and CDATA when possible
Outputs clean JSON in either pretty or minified form

What happens to attributes?

Attributes are preserved with a prefixed key format so they do not get confused with child elements.

Example:

<item category="electronics" available="true">
  <name>Wireless Headphones</name>
</item>

becomes conceptually similar to:

{
  "item": {
    "@_category": "electronics",
    "@_available": "true",
    "name": "Wireless Headphones"
  }
}

What happens to repeated tags?

If multiple child elements share the same tag name, they are grouped into an array. That makes the result more natural to work with in JSON-based applications.

What happens to text nodes?

If an element contains only text, that text is returned directly when possible. If an element contains both attributes and text, the text is preserved alongside the attributes.

This gives you a practical and readable conversion—not just a raw string dump.

Formatting options explained

Indentation: 2 spaces, 4 spaces, or tabs

Use indentation that matches your environment:

2 spaces: common default for web projects and compact readability
4 spaces: wider visual nesting, useful in some enterprise or backend codebases
Tabs: fits teams or editors that prefer tab-based indentation

Minify

Minify is useful when you want:

compact output for transport or storage
one-line XML for embedding
one-line JSON for machine processing
a quick way to remove visual whitespace noise

For human review, pretty-print mode is usually better. For compact output, minify is faster and cleaner.

Real-world tips for safer XML editing

Validate before you copy. Even one invalid character can break imports or integrations.
Format before debugging. Clean indentation makes structural problems much easier to spot.
Convert to JSON when exploring unfamiliar schemas. It can make deeply nested data easier to understand.
Be careful with special characters. &, <, and > often need escaping inside text.
Check repeated elements. Lists of repeated tags are common in feeds and product exports.
Preserve original files when editing important configs. Use this tool to inspect and clean them first, then save a validated copy.

Troubleshooting

“The tool says my XML is invalid.”

Check for missing or mismatched closing tags.
Look for broken attributes or missing quotes.
Make sure special characters like & are properly escaped.
Use the line and column hint (when shown) to jump to the likely problem area.

“I do not see JSON output.”

JSON conversion only works when the XML is valid.
Fix the XML syntax first, then switch back to JSON mode.

“My output is all on one line.”

Minify is enabled. Turn it off to see pretty-printed output again.

“Why are some values in arrays in JSON?”

Repeated sibling tags are grouped as arrays so the converted structure remains accurate and predictable.

“Why do I see keys like @_id or #text?”

These represent XML attributes and text content, helping preserve the meaning of the original XML when converted to JSON.

Perfect for

Developers debugging XML APIs and integrations
SEO and web teams reviewing sitemaps or feeds
Ecommerce teams checking product export files
Students learning XML structure and validation rules
Anyone converting legacy XML data into modern JSON workflows

If you need a fast, private, and practical way to clean up XML, verify that it is valid, or convert it into readable JSON, this tool gives you everything you need in one browser-based editor.

Format, validate, convert, copy, and download—without sending your data anywhere.