Web is one of the most widespread platforms for information exchange today, as it is easier to publish documents. As the number of users and providers increases, the number of documents grows, searching for information becomes a difficult and time-consuming process. Web mining uses various data mining techniques to discover useful knowledge from Web hyperlinks, page content and usage log file. The mining tools are used to scan the HTML documents, images, and text, the results is provided for the search engines.It can assist search engines in providing productive results of each search in order of their relevance. In this paper, we brief introduction to the concepts related to data mining, web mining and then an overview of different Web mining tools. We conclude by presenting a comparative table of these tools based on some pertinent criteria.