Check nested XML
Validate a compact document with repeated child elements.
<catalog><tool id="1"><name>Code Studio</name></tool></catalog>Expected: The document is validated and formatted onto nested lines.
Try in editorCode StudioNew
XML Editor Online
Use the XML editor online to inspect XML documents, catch parser errors, format nested tags, and keep XML snippets in a local browser workspace.
XML code
Output
<tool> <name>ToolerWork</name> </tool>
<tool> <name>ToolerWork</name> </tool>
Best for
Use XML online for
- Validate XML snippets
- Format nested tags
- Inspect API XML
- Check config files
- Review namespaces and attributes
Why use it
Fast browser workflow
- DOMParser validation
- Formatted output
- Readable preview
- Local browser workflow
- Clear parser errors
How to use
Run in four steps
- 1. Open the XML editor.
- 2. Paste XML.
- 3. Click Run.
- 4. Review formatted XML or errors.
Supported workflow
What this XML online editor supports
XML is parsed and formatted entirely in the browser without sending the document to a server. It is designed for focused snippets and learning tasks where a fast browser workspace is more useful than a full local project.
- Catch mismatched, missing, and malformed XML tags
- Format valid nested XML onto readable lines
- Preview XML content in a browser document
- Copy or download the edited XML file
- Inspect attributes, namespaces, comments, and repeated child elements
- Surface browser parser errors before XML is copied into an API or config file
Runtime, files, and honest limits
- Browser runtime
- Native browser DOMParser and XMLSerializer
- File types
- .xml
- Privacy
- Your source stays in the browser workspace during normal use; ToolerWork does not need a code-execution backend for this runner.
- Limit: The editor does not validate against XSD or DTD schemas.
- Limit: External entity loading and server-side XML transformations are not part of the local workflow.
- Limit: Formatting confirms well-formed syntax, not whether element names and values satisfy a business schema.
Runnable examples
XML examples to try online
Start with the built-in project, replace its sample with one of these focused examples, and compare your result with the expected output.
Find a mismatched tag
Use the parser error to locate malformed XML.
<tool><name>Code Studio</tool>Expected: The Problems and Output panels report invalid XML.
Try in editorInspect namespaced XML
Check a document that uses a namespace prefix and attributes on repeated items.
<feed xmlns:tw="https://www.toolerwork.com/schema"><tw:tool id="pdf">Merge PDF</tw:tool><tw:tool id="image">Compress Image</tw:tool></feed>Expected: The namespace declaration, attributes, and both tool elements remain visible in formatted output.
Try in editorFAQ
XML online editor questions
Can I validate XML online?
Yes. ToolerWork uses the browser parser to detect XML syntax errors.
Can I format XML?
Yes. Run outputs a readable formatted XML view.
Does XML execute code?
No. XML is parsed and formatted as data.
Is my XML private?
It is handled locally in the browser workspace.
Does this validate XSD or DTD rules?
No. It checks whether XML is well formed, but it does not confirm an external XSD, DTD, or application-specific business schema.
Can I inspect XML namespaces and attributes?
Yes. Valid namespace declarations, prefixed elements, and attributes remain visible when the document is parsed and formatted.
How does ToolerWork run XML in the browser?
XML is parsed and formatted entirely in the browser without sending the document to a server. The workspace also keeps the active project in local browser storage.
What are the limits of this XML online editor?
The editor does not validate against XSD or DTD schemas. External entity loading and server-side XML transformations are not part of the local workflow. Formatting confirms well-formed syntax, not whether element names and values satisfy a business schema.
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