9 Best Free XML Editors for Mac in 2026 (Tested & Ranked)

XML editors on Mac split into two categories: developer tools (VS Code, oXygen, Sublime) for coding and data work, and GUI-first tools (XMLSpy, Oxygen GUI) for people who need visual tree editing. Which one you need depends on whether you're writing XML by hand or navigating large XML structures. This guide covers both.

1. Visual Studio Code + XML Extension

VS Code with the XML extension by Red Hat is the best free XML editor for Mac. Schema validation, XPath evaluation, auto-completion based on XSD.

Install on Mac:

brew install --cask visual-studio-code

Or download directly from code.visualstudio.com.

Then install the XML extension: Open VS Code, press Cmd + Shift + X, search "XML" by Red Hat, install.

XML-specific features:

• XSD and DTD schema validation
• XPath 2.0 and 3.1 evaluation
• Auto-completion based on schema
• XML formatting and syntax highlighting
• XML catalog support for schema resolution

Setup for schema validation:

Add schema reference to your XML file:

<?xml version="1.0"?>
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:noNamespaceSchemaLocation="schema.xsd">
  <!-- your content -->
</root>

Or configure in VS Code settings (settings.json):

{
  "xml.fileAssociations": [
    {
      "pattern": "**/*.config.xml",
      "systemId": "path/to/schema.xsd"
    }
  ]
}

Best for: Most Mac developers working with XML. Handles config files, SOAP services, Maven/Ant builds, SVG editing.

Not great for: XSLT debugging (basic support only). For serious XSLT work, use oXygen.

2. Sublime Text + XML Prettify

Sublime Text is faster than VS Code for quick XML edits. Opens multi-megabyte files instantly.

Install on Mac:

brew install --cask sublime-text

Or download from sublimetext.com.

XML setup:

1. Install Package Control (Cmd + Shift + P > "Install Package Control")
2. Install XML Prettify: Cmd + Shift + P > "Package Control: Install Package" > search "Indent XML"
3. Format XML: Cmd + K, Cmd + F

XML-specific features:

• Fast opening of large XML files (100MB+)
• XML syntax highlighting built-in
• Code folding for element trees
• Multi-cursor editing for batch tag changes
• XML formatting via Indent XML package

Best for: Quick edits without heavy IDE overhead. Large XML files where VS Code slows down. Developers who value speed over features.

Not great for: XSD validation (limited support). XSLT transforms (no built-in support). Schema-aware auto-completion.

3. oXygen XML Editor

oXygen XML Editor is the professional choice for serious XML work. XSLT debugger, XQuery execution, full schema validation.

Install on Mac:

Download from oxygenxml.com. 30-day free trial with all features. After trial, requires paid license ($99-$499 depending on edition).

XML-specific features VS Code doesn't have:

• XSLT 1.0/2.0/3.0 debugger with breakpoints
• XQuery 1.0/3.1 execution and debugging
• Visual XML Schema (XSD) designer
• RelaxNG and Schematron validation
• XML diff and merge tools
• DITA and DocBook authoring
• Database integration (eXist, MarkLogic)

XPath evaluation:

Built-in XPath console with syntax highlighting. Run XPath 2.0/3.1 queries against your document, see results highlighted in context.

Best for: Anyone doing serious XSLT or XQuery work. Technical writers using DITA. Developers working with complex schema-driven XML ecosystems (healthcare, finance, publishing).

Not great for: Casual XML editing (overkill and expensive). Quick config file edits (too heavy to launch for simple tasks).

4. BBEdit

BBEdit is a native Mac text editor with solid XML support. Mac-native, fast, handles character encodings well.

Install on Mac:

Download from barebones.com or:

brew install --cask bbedit

Free version available. Paid version ($49.99) adds multi-file search and text transformation recording.

XML-specific features:

• XML syntax highlighting and code folding
• Well-formedness checking
• XSLT transformation (apply stylesheets directly)
• Character encoding detection (UTF-8, UTF-16, etc.)
• Grep patterns for XML find-and-replace

Mac-native benefits:

• Respects macOS Dark Mode
• Quick Look integration
• Spotlight integration
• Native Cocoa app (not Electron)

Best for: Mac users who want a native app that feels like it belongs on macOS. Developers who value character encoding accuracy.

Not great for: XSD schema validation (only checks well-formedness). XPath queries (not supported).

5. XML Notepad (via Mono)

Microsoft's XML Notepad runs on Mac via Mono. Side-by-side tree and text view.

Install: Requires Mono. brew install mono, then download XML Notepad and run with Mono.

XML features: XSD validation, XPath queries, XSLT transforms, XML diff.

Best for: Visual tree-based editing. Not great for: Non-native Mac look, requires Mono setup.

6. Brackets

Brackets is a lightweight editor with XML support via extensions.

Install: brew install --cask brackets or download from brackets.io.

XML features: Syntax highlighting, code folding, extensions for formatting and validation.

Best for: Lightweight web-focused editing. Not great for: No longer actively developed by Adobe.

7. CodeBeautify XML Editor (Online)

CodeBeautify is an online XML editor. No install needed.

XML features: Format, validate, tree view, XML to JSON conversion.

Best for: Quick validation without opening an app. Not great for: Sensitive data (online tool), large files.

8. Emacs with nXML Mode

Emacs with nXML mode provides schema-aware validation.

Install: brew install --cask emacs or download from emacsformacosx.com.

XML features: RelaxNG schema validation, context-aware auto-completion, XPath via packages.

Best for: Emacs users who want best-in-class schema validation. Not great for: Steep learning curve for non-Emacs users.

9. TextMate

TextMate is a native Mac editor with XML bundles.

Install: brew install --cask textmate or download from macromates.com.

XML features: Syntax highlighting, code folding, snippets, formatting via bundles.

Best for: Native Mac experience, lightweight. Not great for: Smaller extension ecosystem than VS Code.

XML Editor Comparison

*Free version with limitations or purchase prompts

Recommendation

For most developers: VS Code with the Red Hat XML extension. Free, handles 90% of XML work including XSD validation and XPath queries. For anyone doing serious XSLT or XQuery work: oXygen XML is worth the cost. For quick edits without a heavy IDE: Sublime Text with XML Prettify.

Frequently Asked Questions

What's the best free XML editor for Mac?

VS Code with the XML extension by Red Hat. Install VS Code with brew install --cask visual-studio-code, then install the XML extension from the Extensions panel. You get XSD and DTD validation, XPath 2.0/3.1 evaluation, schema-aware auto-completion, and XML formatting. It handles config files, SOAP services, Maven/Ant builds, and SVG editing. Free and actively maintained.

Does VS Code support XML validation on Mac?

Yes. Install the XML extension by Red Hat. It validates against XSD and DTD schemas. Add a schema reference to your XML file or configure file associations in settings.json. The extension shows validation errors in real-time as you type. It also provides auto-completion based on your schema, which catches structural errors before you save.

How do I validate XML against an XSD schema on Mac?

Use VS Code with the XML extension, or use xmllint from Terminal (pre-installed on Mac). For VS Code: add xsi:noNamespaceSchemaLocation="schema.xsd" to your XML root element. For Terminal: xmllint --schema schema.xsd file.xml --noout. For professional work with complex schemas, oXygen XML Editor provides the most accurate validation with better error messages.

Is there a native Mac XML editor app?

Yes. BBEdit and TextMate are native Mac apps with XML support. BBEdit handles XML syntax highlighting, well-formedness checking, and XSLT transforms. Install with brew install --cask bbedit. TextMate is also native with XML bundles. Both respect macOS Dark Mode and integrate with system features. For tree view editing, XML Notepad runs via Mono but isn't native.

What's the best XML editor for macOS for XSLT transforms?

oXygen XML Editor. It has a full XSLT 1.0/2.0/3.0 debugger with breakpoints, step-through execution, and variable inspection. 30-day free trial available. For simpler XSLT work, BBEdit can apply stylesheets directly. VS Code has basic XSLT support via extensions but no debugger. If you're doing serious XSLT development, oXygen is worth the investment.

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