The Wikidata knowledge base provides a public infrastructure for creating and syndicating machine-readable data about computing resources. We have prepared a set of queries that can be used to gather data sets relevant to digital preservation from Wikidata. We present these data sets in the context of the Wikidata for Digital Preservation portal (Wikidp). Wikidp is a free software portal that allows people to explore data related to digital preservation from the Wikidata knowledge base. Structured data about file formats, the many versions of software titles, and computing environments, are already available in Wikidata. The content of Wikidata is licensed under the Creative Commons Zero license, meaning that anyone can reuse the data for any purpose. The content in Wikidata is available in more than 300 human languages. The data in Wikidata is FAIR data, and it is linked open data. Our portal provides an interface designed for the needs of the digital preservation community.