AMADO online is an application for visualizing and analysing data matrices (presenceabsence, or cross-tabulation, or responses on scales, or measures of heterogeneous variables) according to the principles of Jacques Bertin. Numbers are represented by rectangles whose area are proportional to them. To highlight the structure of the data, the rows (and/or columns) can be reordered, manually, or automatically according to their coordinates on the first factorial axis of Correspondence Analysis, or in Principal Components Analysis, according to the nature of the data; a double Hierarchical Agglomerative Clustering is available. Depending on the case, a seriation (chronological for example), or exact or approximate blocks, or relatively homogeneous classes are obtained. These graphs are faithful to the data and easy to read. The User's Guide, in French and English, describes the sequence of commands for many example files provided with the tool.