1. A computer implemented method, comprising: under control of one or more computing systems configured with executable instructions, receiving, at a distribution server, a request for one or more rendering applications to render a web page source document for compatibility testing with a plurality of different web browsers; receiving a designation of the web page source document with position and dimension data, which identifies one or more code portions of the web pace source document, to suspend, during the compatibility testing, rendering of the one or more code portions by the one or more rendering applications, the one or more code portions including code for rendering of dynamic web content; distributing, by the distribution server, the web page source document with the position and dimension data to the one or more rendering applications on at least one rendering server, the one or more rendering applications to render the web page source document for the plurality of different web browsers; and receiving at least one rendered web page image, corresponding to a particular web browser, generated by a corresponding rendering application from the web page source document.