Abstract: Today, many of the solved problems are spatially oriented. It means that more and more people need to use spatial information. They need to be able to use it quickly, without any special software tool and without any special training. So they need an easy-to-use solution. GeoWeb sites can perfectly fit the demands but they must be properly designed. The article describes usability testing of GeoWeb sites of all Czech regional authorities and proposes some recommendations how user interface should be designed. Recommendations can be generalized because there are no significant differences between private and public sector. The main differences are between target groups of the users: regular or casual users.