WSDL to OpenAPI Converter: SOAP Contract → OpenAPI 3.0
A WSDL to OpenAPI converter reads a SOAP service contract and produces an OpenAPI 3.0 document: every SOAP operation becomes a path with a JSON request schema derived from the operation's actual XSD input types, including nested structures, arrays, enumerations, and required fields. Paste a WSDL URL or upload the file, and download openapi.json, a working starting point for REST gateways, API portals, and code generators.
How it works
- 1
Paste a WSDL URL (ending in ?wsdl) or upload a .wsdl file.
- 2
Click Convert to OpenAPI: the contract is parsed and mapped to OpenAPI 3.0.3.
- 3
Review the generated document and download openapi.json.
Frequently asked questions
How do I convert a WSDL to OpenAPI?
Provide the WSDL above and click Convert. The tool parses the contract with a full XML-schema-aware parser, then maps each SOAP operation to a POST endpoint whose request body schema is generated from the operation's XSD input types: names, types, nesting, arrays, enums, and required flags included.
Is the conversion from SOAP to REST exact?
No conversion can be: SOAP and REST have different semantics. Operations map naturally to endpoints and XSD types to JSON schemas, but SOAP headers, faults, attachments, and RPC-encoded styles have no direct OpenAPI equivalent. Treat the output as an accurate scaffold to refine, not a drop-in replacement.
Why are all the converted endpoints POST?
SOAP operations are remote procedure calls carried in a POST body, and the WSDL contains no information about which operations are safe/idempotent. After converting, change read-only operations to GET with query or path parameters as part of designing your REST interface.
What OpenAPI version is generated?
OpenAPI 3.0.3 in JSON format, compatible with Swagger UI, Postman import, API gateways, and every mainstream OpenAPI code generator.
Can I convert the generated spec back to a SOAP client?
For calling the original SOAP service, skip the conversion and use the WSDL Analyzer directly, which generates ready-to-run SOAP client code in Python, C#, Java, and Node.js from the same contract.
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