The original scanned versions of the Book of Jasher available on public domain sites (like Archive.org) are often unreadable. They suffer from:
Others have debated the book's significance, arguing that it is not a reliable source of historical information. However, many scholars believe that the Kitab Yashar is a valuable resource for understanding the early history of humanity and the cultural and social practices of the ancient Israelites.
Websites like Sacred-Texts.com host the complete text of the Book of Jasher. You can usually view it online, and many browser extensions allow you to "Print to PDF" to save it.