Projektavimas naudojant UML kalbą tampa vis populiaresniu, todėl šios srities įrankių gausa vis didėja. Tampa tikra problema išsirinkti tinkamą UML įrankį. Šiame darbe yra analizuojami UML kalbos projektavimo įrankiai pagal jų galimybes. Yra išnagrinėti 10 pasirinktų UML įrankių, apibūdintos pagrindinės jų charakteristikos, bei palyginti pagal pasirinktus kriterijus. UML įrankių palyginimui buvo sudarytos ir pateiktos lentelės su išvardintais įrankiais bei kriterijais. Remiantis duomenimis iš lentelių, buvo sudaryti UML įrankių palyginimo grafikai. Pateiktas pagrindinių sąvokų detalus aprašymas. Suprojektuota ir sukurta mokomoji svetainė pagal išrinktą UML įrankį. Sukurtas vartotojo vadovas video formatu. Pateiktos rekomendacijos UML įrankio pasirinkimui. / According to the results of the research the design while using UML becomes considerably more popular due to this reason the great variety of tools of this sphere are also increased. Therefore, it goes naturally, that it became a real problem in order a suitable tool of UML to be closen properly. In this work the tools of the projecting of the language are analyzed and also the 10 chosen UML tools are represented while describing their main particularities, they are also compared according to the chosen criteria. In order the comparison of the UML to be carried out properly the tables with mentioned tools and their criterias to be represented. According to the date from the tables the graphs of the comparison of the tools of UML are made and the detailed description of the main conception is presented as well. The educational website according to the chosen appropriate UML tool is projected and created. The guidance of a user is also created in the video format. According to the analysis of UML tools there are given the certain recommendations in order the appropriate tool to be chosen appropriately. Also there are given the aspects with the help of which the choise of a suitable tool of a user can be carried out in the dependency on the desirable project. Acceding to the analysis of the commercial and non-commercial tools the certain recommendations are given.