Systems and methods for automatic package conformance validation are described. A package is a logical entity that specifies multiple datastreams for use by an application to render pages and resources associated with one or more documents. In one aspect, the systems and methods automatically validate conformance of the package in view of one or more package and document specifications. The specification(s) identify sets of criteria that delineate structural and markup conformance for the package and fixed payload(s) that specify the document(s), resources, etc. The systems and methods validate package and fixed payload(s), and notify a user of whether the package, documents, and/or associated resources passed or failed respective ones of the conformance criteria,