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---
layout: default
title: XML Rendering
description: Rendering Markdown documents in XML
---
# XML Rendering
Version 2.0 introduced the ability to render Markdown `Document` objects in XML. This is particularly useful for debugging [custom extensions](/2.3/customization/overview/) as you can see the XML representation of the [Abstract Syntax Tree](/2.3/customization/abstract-syntax-tree/).
To convert Markdown to XML, you would instantiate a `MarkdownToXmlConverter` with an [`Environment`](/2.3/customization/environment/) and then call `convert()` on any Markdown.
```php
use League\CommonMark\Environment\Environment;
use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
use League\CommonMark\Xml\MarkdownToXmlConverter;
$environment = new Environment();
$environment->addExtension(new CommonMarkCoreExtension());
$converter = new MarkdownToXmlConverter($environment);
echo $converter->convert('# **Hello** World!');
```
This will display XML output like this:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<document xmlns="http://commonmark.org/xml/1.0">
<heading level="1">
<strong>
<text>Hello</text>
</strong>
<text> World!</text>
</heading>
</document>
```
Alternatively, if you already have a `Document` object you want to visualize in XML, you can use the`XmlRenderer` class to convert it to XML.
## Return Value
Like with `CommonMarkConverter::convert()`, the `renderDocument()` actually returns an instance of `League\CommonMark\Output\RenderedContentInterface`. You can cast this (implicitly, as shown above, or explicitly) to a `string` or call `getContent()` to get the final XML output.
## Customizing the XML Output
See the [rendering documentation](/2.3/customization/rendering/#xml-rendering) for information on customizing the XML output.
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