Respa is an open-access online system used to extract keywords from text data in Polish. This tool is helpful in determining the ranking of results based on the similarity criteria for keywords in a specific corpus. Choosing the right keywords plays an important role and can be applied in various fields, such as marketing, lexicography, as well as linguistic, literary and library studies. The main task of properly selected keywords in the text is to obtain the appropriate position in the results and increase the chance of reaching a potential customer. The tool can also be used in automatic translation, the development of library information, or the analysis of the style of individual authors or texts.