The idea of web archiving, pioneered in 1996 as a way to preserve web content for future researchers, has remained important in the 21st century. It is evident by the significant number of web archives, the development of web archiving software and tools, and increased awareness of initiatives to preserve the internet-resources, introducing changes in the legislation of some countries to provide access to historical web content. The purpose of the study is to identify web archiving technologies that contribute to the preservation of web content at the global, national and local levels, as well as within the framework of the formation of a wide range of thematic collections. As a result, trends in the development of web archives, approaches to structuring the web archive system for more efficient organization of work with them, as well as stages and methods of implementing web archiving, that allow one to complete the full preservation cycle: collect, save, provide access, distribute and evaluate the results obtained. A conclusion is made, that the prospects for the further development of web archives, taking into account the standards for collecting, preserving and providing long-term access to web content, recommended by the International Consortium for Internet Preservation, including modern web archiving tools (e.g. open source codes). They allow expanding capabilities and the functionality of web archives as sources of searching for open information, obtaining new knowledge, restoring lost information, as well as checking previously published data, that often have great cultural, scientific, educational, artistic and social significance.