Developer Data Tools
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XML tool

XML Formatter & Validator

Format, minify and validate XML documents, SOAP payloads, SVG snippets and copied API responses in the browser.

Tool Workspace

This tool runs in your browser. Developer Data Tools does not save pasted input to a server, but avoid using production secrets, access tokens, private keys or sensitive business data in any online page.

Ready. Processing runs in your browser.

Core Features

  • Format XML with readable indentation.
  • Minify XML for compact test fixtures and transport.
  • Validate well-formed XML with browser parser feedback.
  • Inspect SOAP, RSS, SVG and XML API payloads without JSON assumptions.

How to Use

  1. Paste copied XML into the input editor.
  2. Click Format to make nested elements readable.
  3. Use Validate before debugging namespaces, content type or SOAP faults.
  4. Use Minify when comparing raw payload transport.

Common Errors

  • Unclosed tags or mismatched closing tags.
  • Unescaped ampersands inside text values.
  • Missing namespace declarations in SOAP envelopes.
  • Sending XML with a JSON Content-Type header.
HTML Entity Encoder/Decoder

Escape ampersands, quotes and angle brackets before inserting XML text.

Text Diff Checker

Compare working and failing XML payloads line by line.

Why XML and SOAP Payloads Fail in Modern API Clients

Debug namespaces, SOAP envelopes, Content-Type and escaping issues.