Online materials on Käärijä, the Finnish entry in the Eurovision Song Contest in Liverpool, have been collected in the Finnish Web Archive maintained by the National Library. As Käärijäs popularity became evident during the spring of 2023 the National Library decided to carry out a themed harvest to preserve not only Finnish and international news items, but also a broad range of social media content.

URL addresses of the harvested materials can be browsed to a limited extent in the Finnish Web Archive Index. The resources themselves can be accessed, in accordance with the Copyright Act, from legal deposit workstations at all legal deposit libraries across Finland, at the Library of Parliament and at the library of the National Audiovisual Institute.