Despite today’s storage devices having hundreds of gigabytes on the tip of our finger, not everyone can enjoy such luxury. Not everyone can afford to have such a huge amount of storage nor can all devices support such expansion, if at all. People with devices of limited storage compensate by compressing their images or files in smaller formats such as DjVu (pronounced déjà vu).

DjVu as defined on Wikipedia:

“DjVu (/ˌdeɪʒɑːˈvuː/ DAY-zhah-VOO, like French “déjà vu”[3]) is a computer file format designed primarily to store scanned documents, especially those containing a combination of text, line drawings, indexed color images, and photographs. It uses technologies such as image layer separation of text and background/images, progressive loading, arithmetic coding, and lossy compression for bitonal (monochrome) images. This allows high-quality, readable images to be stored in a minimum of space, so that they can be made available on the web.”

DjVu is technically the perfect alternative format to store large scanned documents containing many images due to its more compact nature than PDFs. It’s perfect for company documents, books and magazines. It’s great for people who want to store large amounts of reading material on their devices, especially on ebook readers. Unfortunately, DjVu is not too popular and is not supported by the Kindle. For Kindle users, there’s really no choice but to convert DjVu documents to either epub or PDF files. Fortunately, there are sites and apps for that.

Converting DjVu to PDF

PDF is supported by practically all mobile devices with PDF reading apps available or packaged in. So this format is the best candidate to convert DjVu files to, especially if those files are work related. The Kindle supports PDF files but may not hold an equivalent large library of converted DjVu files. The site can convert your DjVu files for you fairly easily. You don’t need to download anything since you can do your conversion online. is much recommended because…

  • The site is completely free
  • The site converts your DjVu files with maximum compression ensuring your converted files remain as small as possible. It also converts PDF files to DjVu in case you want to compress your PDfs further. Conversion is as easy as dragging and dropping a file onto the site’s conversion box and let the site do the rest.
  • There is no registration required and
  • Conversion is done in real time, no waiting for your files to be delivered. In case it does make you wait, you can download your converted file through a provided download link and proceed to your other tasks.

Converting ePub to PDF

One of the most popular file formats for Ebooks is the Epub format. Epub as an ebook format gained popularity already by 2007 and reached large level of disribution meanwhile. It is designed for electronic publication and its technical standard is defined by the International Digital Publishing Forum (IDPF). Technically the Epub format is based on the XML standard and you simply can think of it as an archive of HTML text, images and support files. That makes ePub very flexible and the Epub format is available for a wide number of eReaders and is currently the most widely supported ebook format. In its latest Epub also allows complex grahpics and now supports comic books, proper display of math equations, more fonts and better CSS. Epub also allows the ebooks or documents to properly flow depending on the device’s screen. Unfortunatelly, the Epub format is not supported by older versions of the Amazon Kindle natively. The are supporting Mobipocket instead (.mobi).

Considering this varity of formats some of us would rather have one format to rely on instead of two or three. Again, for most devices, that would be the PDF format, even on e-reading devices such as the Kindle and eSlick. One eSlick user has forgone the ePub format and decided to read exclusively on PDFs. Probably the fastest way to get rid of all your Epub ebooks and convert them to PDF is online conversion again of course. Also, there is an excellent tool available for free:   The site is a very simple website that hosts the Java-based epub2pdf app which works on Linux, Windows and Mac OS X. Unfortunately, the app is command-line based so it’s not for all users, though non-tech-savvy folks just need to carefully follow the instructions provided to use the app. The app allows for the flexible conversion of ePub files to PDFs allowing users to specify page size, fonts, margins, and default paragraph alignment. The app does not require much except for downloading the Java Runtime Environment.

So if you have DjVu or ePub files you need to convert, you know where to go. Happy reading and converting.

Categories: Gadgets Technology

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