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WSDL to JSON Converter

Parse WSDL web service definitions and convert them to structured JSON. Extracts operations, messages, port types, bindings, and service endpoints.

Last updated: May 28, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution

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What is WSDL to JSON Converter?

WSDL (Web Services Description Language) is an XML-based language used to describe the interface of SOAP web services. A WSDL document defines what operations a service exposes, what messages those operations accept and return, how the service is bound to a transport protocol (typically HTTP + SOAP), and where the service endpoint is located.

Reading and understanding a raw WSDL file is tedious due to its verbose XML structure. This WSDL to JSON converter parses the WSDL and produces a clean, structured JSON document that summarises all the key information: service names, port types, operations, input/output message definitions, SOAP bindings, and endpoint addresses. This is especially useful when exploring an unfamiliar SOAP API, generating client code, or documenting legacy web services.

How to Use WSDL to JSON Converter

1

Paste your WSDL XML content into the input area on the left

2

The JSON output appears instantly on the right, showing parsed service structure

3

The summary panel shows the number of services, port types, and operations detected

4

Click "Copy JSON" to copy the structured output

5

Click "Download .json" to save the parsed WSDL as a JSON file

Common Use Cases

  • Exploring a legacy SOAP service interface to understand available operations
  • Generating documentation for SOAP web services
  • Extracting operation signatures before writing a SOAP client
  • Comparing two WSDL versions to identify changed or removed operations
  • Feeding parsed WSDL data into a code generator or service catalogue
  • Learning WSDL structure without manually reading verbose XML

Example Input and Output

A simple WSDL for a calculator service parsed to structured JSON:

WSDL input
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://schemas.xmlsoap.org/wsdl/"
  xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
  targetNamespace="http://example.com/calculator">
  <message name="AddRequest">
    <part name="a" type="xsd:float"/>
    <part name="b" type="xsd:float"/>
  </message>
  <message name="AddResponse">
    <part name="result" type="xsd:float"/>
  </message>
  <portType name="CalculatorPortType">
    <operation name="Add">
      <input message="tns:AddRequest"/>
      <output message="tns:AddResponse"/>
    </operation>
  </portType>
  <service name="CalculatorService">
    <port name="CalculatorPort" binding="tns:CalculatorBinding">
      <soap:address location="http://example.com/calculator"/>
    </port>
  </service>
</definitions>
JSON output
{
  "targetNamespace": "http://example.com/calculator",
  "wsdlVersion": "1.1",
  "portTypes": [
    {
      "name": "CalculatorPortType",
      "operations": [
        {
          "name": "Add",
          "inputMessage": "AddRequest",
          "outputMessage": "AddResponse",
          "faultMessages": []
        }
      ]
    }
  ],
  "messages": [
    { "name": "AddRequest", "parts": [{"name":"a","type":"float"},{"name":"b","type":"float"}] },
    { "name": "AddResponse", "parts": [{"name":"result","type":"float"}] }
  ],
  "services": [
    {
      "name": "CalculatorService",
      "ports": [{ "name": "CalculatorPort", "binding": "CalculatorBinding", "address": "http://example.com/calculator" }]
    }
  ],
  "operationCount": 1
}

How This Tool Works

The WSDL XML is parsed with the browser's native DOMParser. The tool uses getElementsByTagNameNS with the WSDL namespace URI (http://schemas.xmlsoap.org/wsdl/) to locate portType, message, binding, and service elements regardless of namespace prefix. SOAP binding and address elements are resolved against both SOAP 1.1 and SOAP 1.2 WSDL extension namespaces. All extracted data is assembled into a typed JavaScript object and serialised with JSON.stringify.

Technical Stack

Browser DOMParser APIWSDL 1.1 namespace traversalSOAP 1.1 and 1.2 WSDL extensionsClient-side only

Privacy First

WSDL parsing runs entirely in your browser using the native DOMParser. Your WSDL files — which may contain internal service addresses and namespace identifiers — are never transmitted to our servers.

Frequently Asked Questions

What WSDL versions does this tool support?
This tool supports WSDL 1.1, which is the most commonly deployed version and the one produced by WCF, Axis2, JAX-WS, and most SOAP frameworks. WSDL 2.0 (the W3C successor) uses a different element structure and is not yet supported.
What does the tool extract from a WSDL?
The tool extracts: portTypes (interface definitions with operation names and their input/output messages), message definitions (parts with type or element references), SOAP bindings (transport, style, and per-operation soapAction values), and service endpoints (addresses). Inline XSD type definitions are noted but not deeply parsed.
What is a portType and how does it relate to an operation?
A portType is a named set of operations — essentially the interface definition. Each operation in the portType has an input message, an optional output message, and zero or more fault messages. A binding element then maps a portType to a specific transport protocol (SOAP over HTTP). The service element maps a binding to a concrete endpoint URL.
My WSDL has inline XSD types — are they parsed?
The tool focuses on the service interface metadata (operations, messages, bindings, services) rather than deep XSD type parsing. If your WSDL embeds complex XSD schemas inside a types section, those schema definitions are listed but not fully traversed. For deep schema analysis, use an XSD-specific parser.
Is the WSDL data sent to a server?
No. All parsing runs entirely in your browser. WSDL files often contain internal service URLs and namespace identifiers — none of this data is transmitted to our servers.