A method for file conversion includes obtaining an original file including content, that includes objects. The method further includes rendering each object of the multiple objects into a page description language (PDL) format to obtain rendered objects, and extracting, from the original file, a tag for an object of the multiple objects. The method further includes generating object composition metadata based on a composition rule corresponding to the tag. The object composition metadata includes a description of a composition of the object in the original file, and is added with the rendered objects to a PDL file.