The most popular, fast, and compact reader. It has a tabbed interface and advanced printing options.
If you find DjVu files difficult to manage, you can convert them to PDF without downloading extra software using online tools: DjVu2PDF kak skachat format djvu
To download or open files, you usually need specific software because most operating systems don't support this format natively. DjVu is popular for scanned documents because it compresses high-resolution images into very small files. 1. How to View DjVu Files (Readers) The most popular, fast, and compact reader
An open-source viewer that works well on Mac systems. For Android/iOS: The most popular
You can install the DjVu Browser Plug-in (though it is becoming less common) to view these files directly in your web browser before saving them. 3. Converting to PDF