Slides of the article. It presents a proposal for avoiding accessibility errors in Web 2.0 contexts through a new concept of web editor that helps non-technical content writers to evaluate and repair accessibility errors. This proposal implements accessibility guidelines and pays special attention to communication issues following the semiotic engineering principles. The communication of accessibility errors is made through several disabled “personas” enabling the writer to empathize with the user through simulation tools. A proof-of-concept prototype was created and showed quite good results when tested on 8 users in comparison with a traditional evaluation tool.