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

Most Mac developers already have VS Code installed. For occasional XML config file edits, that's enough. Add the Red Hat XML extension and you get XSD validation, XPath queries, and autocomplete. It's free and works well for Spring configs, Maven POMs, Android manifests, and SVG files.

For specialized XML work, you need oXygen XML Editor ($99/year). It has XSLT debugging with breakpoints, visual schema designers, and XQuery support. Most developers don't need it. But if you're doing XSLT development or working with complex healthcare/finance XML, oXygen is the industry standard.

Use VS Code for normal XML editing. Use oXygen for XSLT debugging and schema design. Use BBEdit if you want a native Mac app that launches fast.

This guide covers nine XML editors for Mac with native apps, cross-platform tools, and professional authoring environments.

The 9 Best Free XML Editors for Mac in 2026

1. Visual Studio Code + XML Extension

If you're already writing code in VS Code, you don't need another XML editor. Install the XML extension by Red Hat and you get XSD validation, XPath evaluation, and schema-aware auto-completion.

Install on Mac:

brew install --cask visual-studio-code

Or download from code.visualstudio.com.

Then install the XML extension: Press Cmd + Shift + X, search "XML" by Red Hat, install.

What you get:

• XSD and DTD schema validation with real-time error highlighting
• XPath 2.0 and 3.1 evaluation with results highlighted in context
• Auto-completion based on your schema (knows which elements and attributes are valid)
• XML formatting (Shift + Option + F)
• XML catalog support for resolving schema locations

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"
    }
  ]
}

VS Code uses 200-300MB of RAM because it runs on Electron. That's heavy compared to native Mac apps like BBEdit, but if you're already running VS Code for TypeScript or Python, adding XML work costs nothing extra.

The extension doesn't include an XSLT debugger. You can apply stylesheets via extensions, but there's no breakpoint debugging or step-through execution. For serious XSLT work, use oXygen.

Download: Download VS Code Free and open source

2. Sublime Text + XML Prettify

Sublime Text launches in under half a second and opens 100MB XML files without freezing. That's the reason to use it over VS Code for quick XML tasks.

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 Indent XML: Cmd + Shift + P > "Package Control: Install Package" > search "Indent XML"
3. Format XML: Cmd + K, Cmd + F

What you get:

• XML syntax highlighting and code folding built-in
• Fast opening of large XML files (100MB+) where VS Code slows down
• Multi-cursor editing for batch tag changes
• XML formatting via Indent XML package
• Goto Anything (Cmd + P) to jump to specific tags

What you don't get:

• XSD schema validation (only checks well-formedness)
• XSLT transforms (no built-in support)
• Schema-aware auto-completion

The free version has full functionality. A popup asks you to buy a license occasionally but never blocks features. The $99 license (one-time, no subscription) removes the popup.

Sublime doesn't have a tree view for XML. If you need to collapse and expand nested structures visually, use VS Code with the XML extension or XML Notepad.

Download: Download Sublime Text Free version with occasional purchase prompts

3. oXygen XML Editor

oXygen is the professional choice for serious XML work. XSLT debugger with breakpoints, XQuery execution, visual schema designer, and the most accurate XSD validation available.

Install on Mac:

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

What oXygen has that VS Code doesn't:

• XSLT 1.0/2.0/3.0 debugger with breakpoints, step-through execution, and variable inspection
• XQuery 1.0/3.1 execution and debugging
• Visual XML Schema (XSD) designer for creating schemas graphically
• RelaxNG and Schematron validation
• XML diff and merge tools for comparing versions
• DITA and DocBook authoring with specialized views
• Database integration (eXist, MarkLogic, BaseX)

XPath console:

Built-in XPath console with syntax highlighting. Run XPath 2.0/3.1 queries against your document, see results highlighted in context. This is faster than searching manually through large XML files.

When to use oXygen:

• You're doing XSLT or XQuery development and need a debugger
• You're a technical writer using DITA or DocBook
• You work with complex schema-driven XML ecosystems (healthcare HL7, finance FpML, publishing JATS)
• You need to create or modify XSD schemas visually

When not to use oXygen:

• Quick config file edits (too heavy to launch for simple tasks)
• Casual XML editing (overkill and expensive for occasional use)

Download: Download oXygen XML Editor 30-day free trial, then $99-$499

XML Editor Comparison Table

4. BBEdit

BBEdit is a native Mac text editor with solid XML support. It respects macOS Dark Mode, integrates with Spotlight and Quick Look, and feels like it belongs on a Mac (because it's a native Cocoa app, not Electron).

Install on Mac:

brew install --cask bbedit

Or download from barebones.com.

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

What you get:

• XML syntax highlighting and code folding
• Well-formedness checking (catches unclosed tags, mismatched brackets)
• XSLT transformation (apply stylesheets directly from the menu)
• Character encoding detection (UTF-8, UTF-16, ISO-8859-1, etc.)
• Grep patterns for XML find-and-replace

Mac-native benefits:

• Launches in under a second
• Uses 40-60MB RAM (vs 200-300MB for VS Code)
• Respects macOS Dark Mode automatically
• Quick Look integration for previewing files
• Spotlight integration for searching file contents
• Native Cocoa app (not Electron)

What you don't get:

• XSD schema validation (only checks well-formedness, not schema compliance)
• XPath queries (not supported)
• Schema-aware auto-completion

BBEdit makes sense if you value native Mac apps and don't need schema validation. For config files, SVG editing, or SOAP messages where you just need to check structure, it's fast and lightweight.

Download: Download BBEdit Free version with paid upgrade option

5. XML Notepad (via Mono)

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

Install:

Requires Mono runtime:

brew install mono

Then download XML Notepad from microsoft.github.io/XmlNotepad and run with Mono.

What you get:

• Visual tree-based editing (expand/collapse nodes, drag-and-drop to reorder)
• XSD schema validation
• XPath queries with results highlighted
• XSLT transforms (apply stylesheets and see output)
• XML diff (compare two XML files side-by-side)

What you don't get:

• Native Mac look and feel (it's a Windows app running via Mono)
• Fast launch (Mono adds startup overhead)

XML Notepad makes sense if you need visual tree editing and don't mind the non-native interface. For developers comfortable with text editing, VS Code or Sublime Text are faster.

Download: Download XML Notepad Free, requires Mono

6. Brackets

Brackets is a lightweight editor with XML support via extensions. Adobe sunset the official version in 2021, but community forks keep it alive.

Install:

brew install --cask brackets

Or download from brackets.io.

What you get:

• XML syntax highlighting and code folding built-in
• Extensions for formatting and validation via the extension manager
• Live preview for SVG files (useful if you're editing SVG graphics)
• Git integration built-in

What you don't get:

• Active development (Adobe stopped maintaining it in 2021)
• Performance optimization (slower than Sublime Text or VS Code)

If you're already using Brackets, you can keep using it for XML. If you're choosing a new editor, VS Code is faster and more actively developed.

Download: Download Brackets Free and open source with community support

7. CodeBeautify XML Editor (Online)

Browser tools skip the install step. Open the site, paste XML, get formatted output with error highlighting and a tree view.

What you get:

• Format (add indentation), minify (remove whitespace)
• Tree view for navigating nested structures
• XML to JSON conversion
• File upload (don't have to copy-paste)

What you don't get:

• XSD schema validation (only checks well-formedness)
• Performance past 2-3MB (parsing happens in browser)
• Offline access (needs internet connection)

Don't paste sensitive data (credentials, API keys, customer data) into any web tool. They might log your input.

Use this for validating small snippets from email or chat before you write code around them. Or for sharing formatted examples with teammates during debugging.

Check it out: Try CodeBeautify XML Editor Free online tool

8. Emacs with nXML Mode

Emacs with nXML mode provides the best schema validation available in a free editor. It uses RelaxNG schemas and validates as you type with context-aware error messages.

Install:

brew install --cask emacs

Or download from emacsformacosx.com.

nXML mode is built into Emacs. Open an XML file and it activates automatically.

What you get:

• RelaxNG schema validation (more expressive than XSD for some use cases)
• Context-aware auto-completion (knows which elements and attributes are valid at cursor position)
• XPath via packages (install xpath-mode or nxml-mode extensions)
• Keyboard-driven editing (faster than mouse-based once you learn the shortcuts)

What you don't get:

• Easy learning curve (Emacs has a steep learning curve if you're not already an Emacs user)
• XSD validation out of the box (nXML uses RelaxNG, not XSD)

Emacs makes sense if you're already an Emacs user or willing to invest time learning it. For everyone else, VS Code is easier to start with.

Download: Download Emacs for Mac Free and open source

9. TextMate

TextMate is a native Mac editor with XML bundles for syntax highlighting, code folding, and snippets.

Install:

brew install --cask textmate

Or download from macromates.com.

What you get:

• XML syntax highlighting and code folding
• Snippets for common XML patterns
• Formatting via XML bundle
• Native Mac app (Cocoa, not Electron)

What you don't get:

• XSD schema validation
• XSLT debugging
• Large extension ecosystem (smaller than VS Code)

TextMate makes sense if you want a lightweight native Mac app and don't need schema validation. For quick config file edits, it's faster than launching VS Code.

Download: Download TextMate Free and open source

Which XML Editor Should You Actually Use?

If you're already in VS Code all day writing code, just use VS Code with the XML extension. The XSD validation and XPath evaluation are already there. No extra install needed.

If you need XSLT debugging or work with complex schema-driven XML (healthcare HL7, finance FpML), oXygen is worth the cost. The 30-day trial lets you test it first.

If you want a native Mac app that launches fast and uses minimal RAM, BBEdit is the best option. It handles XML syntax highlighting, well-formedness checking, and XSLT transforms without the Electron overhead.

If you regularly open files over 50MB, Sublime Text handles large files better than VS Code. It opens 100MB XML files without freezing.

If you need visual tree editing and don't mind the non-native interface, XML Notepad via Mono works. Edit in the tree view and the text updates automatically.

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 (xsi:noNamespaceSchemaLocation="schema.xsd") 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?

Three options: VS Code with the XML extension (easiest), xmllint from Terminal (pre-installed on Mac), or oXygen XML Editor (most accurate). 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 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 like Spotlight and Quick Look. 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 (Markup menu → Apply XSLT Stylesheet). VS Code has basic XSLT support via extensions but no debugger. If you're doing serious XSLT development, oXygen is worth the investment.

Can I edit XML files on Mac without installing software?

Yes. Use CodeBeautify's online XML editor at codebeautify.org/xmlviewer. Paste your XML, get formatted output with error highlighting and a tree view. No install needed. Don't paste sensitive data (credentials, API keys, customer data) into any web tool. For sensitive XML, use an offline editor like VS Code or BBEdit.

Using Windows? See our guide to the best XML editors for Windows for Windows-specific options.

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