In various example embodiments, systems and methods for a domain split display are provided. A first request call directed to a first domain is received. In response, first served content including content retrieved based on the first domain is transmitted to a client device. The first served content is used by the client device to generate a parent page comprising a content iframe, which is associated with a second domain. A second request call directed to a second domain is received and second served content is transmitted to the client device. The second served content includes content retrieved from the second domain. The second served content causes a data receiver iframe associated with the first domain and an event receiver iframe associated with the second domain to be displayed within the content iframe. User-generated content for display in the data receiver iframe is then transmitted. The user-generated content is retrieved from the second domain, whereby the second domain is different from the first domain. The data receiver iframe may communicate a size required to display the user-generated content to the event receiver iframe, which in turn, communicates the size to the parent page.