Calibre and Kavita are two open source and self-hostable projects that accomplish what you're describing. Calibre: https://calibre-ebook.com/ https://calibre-e

Calibre and Kavita are two open source and self-hostable projects that accomplish what you're describing. Calibre: https://calibre-ebook.com/ https://calibre-ebook.com/ Kavita: https://www.kavitareader.com/ https://www.kavitareader.com/