MXML is an XML-based user interface markup language used by the Adobe Flex framework to declaratively lay out components, containers, and data bindings for rich internet applications.

Is my MXML data secure?

Yes. All parsing is done in your browser using JavaScript. No data is sent to our servers, so your MXML never leaves your device.

Can I format minified MXML with this tool?

Yes. The Format button re-indents and beautifies minified or single-line MXML, making the component hierarchy easy to read before you copy or download it.

Does the viewer validate MXML syntax?

It validates the underlying XML structure as you type, flagging unclosed tags, mismatched elements, and other malformed markup so you can correct errors before exporting.

What file types can I open?

You can upload .mxml files or paste any well-formed XML-based markup. Because MXML is built on XML, the tree view and formatter also work with general XML snippets.

MXML Viewer - Free Online MXML File Viewer & Editor

Open and edit MXML files online, viewing the data as a tree structure. Free MXML viewer and editor to format, analyze, and validate in your browser.

Paste or upload an MXML file and this viewer instantly renders its Adobe Flex markup as a collapsible tree, showing every component tag, attribute, and nested child. It validates the XML syntax as you type, formats minified MXML for readability, and lets you copy or download the cleaned result. All parsing runs locally in your browser.

MXML Input

0 chars

MXML Viewer

Enter MXML to view structure

How to Use the MXML Viewer

1. Upload MXML

Paste your MXML code or upload a file.

2. View Structure

Visualize your MXML in an interactive tree view.

3. Format & Edit

Format your MXML and copy or download the result.

Key Features

✓Tree View: Navigate complex MXML structures easily with a collapsible tree view.
✓Validation: Automatically validate your MXML syntax as you type.
✓Privacy First: All processing happens locally in your browser.
✓Formatting: Beautify minified MXML for better readability.

References

W3C — Extensible Markup Language (XML) 1.0
The W3C specification defining XML syntax, the foundation on which MXML markup is built.
MDN — XML introduction
A practical overview of XML structure, elements, and attributes that apply to MXML documents.

Related Tools

XML Viewer

View and explore any XML document in a collapsible tree structure.

XML to JSON

Convert XML or MXML markup into a structured JSON object.

XML Minifier

Compress XML by stripping whitespace and comments for smaller files.

SVG Viewer

Preview and inspect SVG XML markup with a live render.

Frequently Asked Questions

What is MXML?: MXML is an XML-based user interface markup language used by the Adobe Flex framework to declaratively lay out components, containers, and data bindings for rich internet applications.
Is my MXML data secure?: Yes. All parsing is done in your browser using JavaScript. No data is sent to our servers, so your MXML never leaves your device.
Can I format minified MXML with this tool?: Yes. The Format button re-indents and beautifies minified or single-line MXML, making the component hierarchy easy to read before you copy or download it.
Does the viewer validate MXML syntax?: It validates the underlying XML structure as you type, flagging unclosed tags, mismatched elements, and other malformed markup so you can correct errors before exporting.
What file types can I open?: You can upload .mxml files or paste any well-formed XML-based markup. Because MXML is built on XML, the tree view and formatter also work with general XML snippets.