XML Formatter
Format and validate XML.
How do you format and validate XML online?
Docuboxer's XML formatter indents, beautifies and validates XML documents directly in your browser — the file is never uploaded to any server. Paste a minified or messy XML — a SOAP response, an RSS feed, a sitemap, an invoice export — and get the same document back with readable hierarchical indentation, every tag at its level. At the same time, the validator checks that the document is well-formed and flags common breakers: unclosed tags, badly nested elements, unquoted attributes, unescaped characters. Because processing happens in your device's memory, you can format XML containing financial or corporate data without it leaving your machine, and the tool keeps working offline once the page has loaded. It's equally useful for debugging an integration that refuses to parse and for simply reading an XML that arrived as one endless line.
How to use XML Formatter
- Paste your messy or minified XML into the tool's input panel.
- The validator checks the document structure while the formatter applies hierarchical indentation to every tag level.
- Review the formatted, validated XML, fix any flagged errors, and copy the result or download the readable file.
Common use cases
Validate and format XML config files
Check the structural correctness of web.config, pom.xml, AndroidManifest or any XML configuration before deploying it to production, avoiding startup failures.
Debug SOAP responses and legacy APIs
Tidy up XML responses from SOAP services and older systems that arrive as a single line, so you can inspect the structure, find the node you need and see why an integration fails.
Process RSS feeds and XML sitemaps
Format and validate RSS/Atom feeds and XML sitemaps to make sure they meet the standard before submitting them to Google Search Console or content aggregators.
Review XML data exports
Accounting, payroll and government systems often export XML. Make it readable to audit the content before importing it into another system or handing it to a third party.
Read electronic invoices privately
E-invoicing formats are XML full of tax IDs and amounts. Format them to review line items without uploading fiscal data anywhere — it all stays in your browser.
Frequently asked questions
How do I format an XML file online?
Paste the XML into the input panel (or load the file) and the tool applies hierarchical indentation instantly: every nested tag sits at its level, readable at a glance. Everything is processed locally in your browser — no signup, no upload.
How do I fix an XML that arrives minified in one line?
Just format it: the tool rebuilds the tag hierarchy and presents it with consistent indentation. It never changes the content or the order of your data — only the presentation.
What XML errors does the validator detect?
Unclosed tags, badly nested elements, unquoted attributes, unescaped characters, invalid XML declarations and encoding problems that break parsing. It points to where the problem is so you can fix it fast.
Does it support XML with namespaces and XSD schemas?
The formatter handles documents with namespaces (xmlns) correctly and indents them cleanly. Validation checks that the document is well-formed, but it does not validate against external XSD schemas.
What's the difference between valid and well-formed XML?
Well-formed means the syntax is correct: closed tags, coherent nesting, quoted attributes. Valid means it additionally conforms to a schema (XSD/DTD) that defines which elements are required. This tool guarantees the first — which is what breaks parsing in most real cases.
Is my XML uploaded to a server?
No. Formatting and validation run entirely in your browser's memory: no server, no logs, no retention. It even works offline once the page has loaded.