Held annually by the Brazilian Computing Society (SBC), the Brazilian Symposium on Multimedia and Web Systems (WebMedia) is the main event on the subject in Brazil and an excellent opportunity for scientific and technical exchanges between students, researchers and professionals in the areas of Multimedia, Hypermedia and the Web. In 2023 we will be celebrating the 29th edition of WebMedia, jointly organized by two units of the University of São Paulo (USP): the Faculty of Philosophy, Sciences and Letters of Riberão Preto (FFCLRP) and the Institute of Mathematical and Computer Sciences (ICMC).