Differences between Salesforce provided WSDL files

Enterprise WSDL

The Enterprise WSDL is strongly typed and tied to a specific Salesforce org's configuration. It reflects the exact custom fields and custom objects in that org. Because it is org-specific, the Enterprise WSDL changes whenever modifications are made to the org's configuration (such as adding custom fields or objects). The Enterprise WSDL is intended primarily for Salesforce customers building integrations for their own org.

Partner WSDL

The Partner WSDL is loosely typed and can be used to interact with any Salesforce org's configuration. It is static and does not change when org modifications are made. The Partner WSDL is intended primarily for Salesforce Partners who build integrations that work across multiple orgs.

How to Download a WSDL File

Salesforce Lightning:

1. Click Setup | Integrations | API.
2. Click the link to download the appropriate WSDL.
3. Save the file locally with a .wsdl file extension.

Salesforce Classic:

1. Click Setup | Develop | API.
2. Click the link to download the appropriate WSDL.
3. Save the file locally with a .wsdl file extension.