In this paper1 we present an overview of a prototype we are developing for in the context of web archives (page comparison, crawling and information retrieval). It analyses pages based on their DOM tree information and their visual rendering. This tool implements a modified version of VIPS with the aim of enhancing the precision of visual block extraction and the hierarchy construction. First, the visual rendering of a page, produced by several browsers, is segmented into rectangular blocks. Then, the extracted blocks are analysed looking for visual overlaps, which are analysed using a adapted version of the XY-Cut algorithm and resolve the overlap. As a result we may have different shapes of blocks, rectangular and non-rectangular blocks. Finally, the visual block tree, representing the layout of the page is analysed in order to have a more coherent layout disposition.