: A user-friendly Windows application that supports library management and night mode.
: A minimal, extremely fast document viewer for Windows that supports FB2 along with PDF and ePub. Best Apps for Mobile Devices Favourite Book Reader - FBReader
The format is one of the most popular file types for electronic books, especially in Russia and Eastern Europe. It is based on XML, which allows it to preserve the structure of a book—chapters, verses, quotes, and footnotes—ensuring they look great on almost any screen. How to Open FB2 on a Computer
: A powerful tool for managing large digital libraries. It not only reads FB2 but also converts them into other formats like EPUB or MOBI.