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Free Developer Tool
SOAP Formatter & Validator: Beautify, Minify & Validate XML
Paste a SOAP request or response to beautify it with clean indentation, minify it, or validate it. The tool checks that the XML is well-formed and that the SOAP 1.1 or 1.2 envelope follows the W3C rules, then shows the operation, header blocks and fault details. Everything runs in your browser.
SOAP Formatter & Validator
Beautify, minify and validate SOAP 1.1 and 1.2 messages or any XML, right in your browser.
Tip: press Ctrl + Enter to format.
Formatting and validation run in your browser. Your XML is not uploaded unless you use Load URL, which fetches the address you enter.
SOAP Versions (1.1 & 1.2)
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Indent Styles
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Runs in Your Browser
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Sign-ups Required
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How It Works
How to Format and Validate a SOAP Message
Clean up and check any SOAP envelope in four quick steps.
Paste or Load Your XML
Paste a SOAP message, upload or drop an .xml file, load a WSDL from a URL, or try one of the samples.
Format or Minify
Beautify with 2, 3 or 4 spaces or tabs, optionally put attributes on new lines, or minify to a single line.
Review the Validation
See XML errors with the exact line and column, plus SOAP envelope, header and fault checks.
Copy, Download or Share
Copy the result, download it as an .xml file, or create a share link that keeps the XML in the link itself.
What It Checks
SOAP Messages, Beautified Validated
Most online SOAP beautifiers only re-indent your XML. This tool also checks it: first that the XML is well-formed, then that the SOAP envelope follows the W3C SOAP 1.1 or SOAP 1.2 specification, so you can spot a wrong namespace, a misplaced Header or an invalid Fault before your service rejects it.
1/ Well-Formed XML
Matching tags, quotes, entities, characters, comments, CDATA, DOCTYPE syntax and XML namespaces, with the exact line and column of any error.
2/ SOAP 1.1 & 1.2 Rules
Envelope namespace, Header and Body order, header block qualification, mustUnderstand values and Fault structure.
3/ Safe Formatting
Only the whitespace between tags changes. Text, CDATA, comments and attribute values are kept exactly as you wrote them.
Use Cases
Who Uses a SOAP Formatter?
Developers, testers and integration teams use it to read and debug SOAP traffic.
Debug API Calls
Turn a one-line request or response from your logs into readable, indented XML and find the problem fast.
Read SOAP Faults
See the fault code, reason, subcodes and detail of a SOAP 1.1 or 1.2 Fault at a glance.
Inspect WSDL Files
Load a WSDL from its URL and browse it in the collapsible tree view.
Share With Your Team
Send a link that opens the same message in the tool. The XML lives in the link, not on our servers.
API & Integration Projects
Need a SOAP or REST integration built or fixed? Our development team can help.
FAQs
SOAP Formatter FAQs
Common questions about formatting and validating SOAP messages.
It takes a SOAP message, which is often a single long line of XML, and adds line breaks and indentation so it is easy to read. This tool can also minify the message back to one line and validate it.
No. Only the whitespace between tags is changed. Text values, CDATA sections, comments and attribute values are kept exactly. Elements that mix text and child elements are left untouched, because whitespace there can be meaningful.
It checks that the XML is well-formed (XML 1.0 and Namespaces in XML), then applies the SOAP 1.1 or SOAP 1.2 rules: the envelope namespace, Header and Body order, header blocks, mustUnderstand values and the Fault structure. It does not check your message against a WSDL or XML Schema.
They use different envelope namespaces (http://schemas.xmlsoap.org/soap/envelope/ for 1.1 and http://www.w3.org/2003/05/soap-envelope for 1.2) and different Fault formats: faultcode and faultstring in 1.1, Code and Reason in 1.2. The tool detects the version automatically.
Yes. Formatting and validation run entirely in your browser. Load URL fetches the address you enter through our server without storing it, and share links keep the XML in the part of the link after #, which browsers never send to a server.
Yes. Any well-formed XML can be formatted, minified and viewed as a tree. SOAP checks only run when the root element is a SOAP Envelope.
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