📤Chem open DjVu format: services, programs and converters.

Specifications and features of DjVu files

DjVu format is a fairly niche and is mainly used to compress the various documents - manuscripts, books, paintings and manuscripts. The most effective themselves DjVu shows a black and white texts, where the difference between a source code and a finished image may be 100 times. This is facilitated by the algorithm used JB2, which is on the same page pieces and uses them repeatedly if necessary. This approach is particularly relevant when converting scanned images of large books where the entire volume will be used one vocabulary. But if in the background there is a background dictionary that algorithm is not very save and format is necessary to increase the file size.

Color images are divided into three main layers - the foreground and background and mask. The mask contains the text and is formed by the algorithm JB2. Foreground and background lower quality and contain information about the color.

Generally, DjVu contains several algorithms therefore can compress images with varying degrees of loss and volume.

Programs for direct viewing

Naturally, the format has acquired a variety of applications that are able to read it properly. Let us examine the most popular ones for different platforms.

On a Windows PC, Linux and Mac

Although it is more convenient right now to take advantage of any online service to view, there is still plenty of e-readers for the DjVu format for PC.

WinDjView and MacDjView

Probably the most popular program of all. As you might guess from the name, there is a version for Windows and MacOS. On Linux, you can run the version of windows from under Wine.

The program is completely free and supports a wide range of versions of Windows, from from XP. Documents can be opened in a few moving between tabs as in modern browsers. Left mode you can set the table of contents in the form of page thumbnails.

DjVu Solo

Another simple program to read DjVu files for Windows. In fact, it is an exact copy of the previous program. In addition to reading the file the paid version of the program itself can create them directly from the scanner, and convert other image formats DjVu.

Evince

We could not ignore the Linux users. Evince - version of the universal reader for the system. Program available from the standard repositories. For Ubuntu / Debian installation looks like this: sudo apt-get install evince. And for Fedora so: sudo yum install evince evince-djvu evince-dvi.

The program provides the most basic functionality to read DjVu and similar format. That is, you can just open and read the data and all.

On gadgets with Android and iOS

Mobile platforms also had time to acquire a large number of different software to read DjVu files. Let's look at a few particularly popular.

EBookDroid

Downloads EbookDroid already exceeded 5 million

This application is one of the best ebook reader on Android. In addition DjVu supports a bunch of related formats - PDF, XPS, CBR FB2 and t. D.

The program interface is designed as a bookshelf, which will appear automatically added to a flash drive or memory files. Setup and application functionality a bit confusing, and to find the first time the desired option is complicated. But after a couple of times and get used to the use of an opportunity to assess fairly rich functionality. Application runs smoothly and it is seen that its internal structure is optimized for maximum developers. The product is free and depending on the particular device can support a particular version of Android.

DjVu Reader

Reader for iOS is called here so modestly. Actually the application functionality is not particularly extensive. You can read DjVu and PDF. All done in a minimalist style. No need to dig into the pile of settings and options. I open the document and read it. From features can be identified unless the support of cloud services "out of the box."

Opening DjVu files to other formats using conversion

Sometimes you need to convert DjVu file to another more popular and convenient format. For example, to PDF. With a probability of 99% when you search you will find a lot of online services, which carry out this operation. It is certainly convenient, but if you suddenly need is a program that is suitable for this DjView DjVuLibre.

The program itself is a reader with the ability to export a large range of different formats. To convert the current book you want to go to the "File" and select "Export".

Here you can select whether the entire document needs completely, or only a few pages. And also need to specify the output file type.

After pressing the "OK" button to begin the conversion process. His progress will be displayed in the progress bar. Processing of large files may take some time.

Online services to work with DjVu documents

Online services to work with DjVu can be divided into two categories: those who read and those that convert. We will tell you about a couple of those and those.

Services for viewing files

Good online book readers are not so much. Although the functionality and convenience of a very subjective thing and can someone like, and some do not.

RollMyFile.com

Free service for reading a large number of formats online. Text documents, spreadsheets, images, archives, and of DjVu. Start service is very easy - just drag and drop the file into the hand of the robot or point it directly through the selection option.

Then the download process will begin at the end of the service which will open the file in a new browser window.

Ofoct.com

Interesting multi-service, allowing to read and convert a large list of different data formats. From viewing images to merge files of 3D models. In the right block we need to find the item DjVu Viewer Online.

The window to ask us to specify the desired file. On it you can paste the link, drag it to a specified area, or click Upload and obvious way to choose our DjVu.

After downloading the file to the server, the service prompts you to select the capacity in which it is necessary to show - Low (low) or High (highest).

Then click View to the right of choice and quality in front of us will open the document.

Services for conversion

Services to convert DjVu into other formats may need when you do not want to look for programs and services to view, and a PC or a mobile gadget is already optimally configured, for example, a PDF.

Ofoct.com

Yes, this service is already being used for reading. It also helps in the conversion. However, I have a little wander the site to find the desired section. In the main we have to find a block eBook Converter, and in it a link Convert eBook to PDF.

In the new window, we will meet a large range of different settings, such as font size, margins, and the target device list of metadata. Below is a form to upload the file to the server. Clicking the Upload button will bring up a file selection. Specifying desired, we will upload it to the server. Now you can set different settings, and then click Convert.

After completing the click Download and download the finished PDF file to your computer.

DjVu2pdf.com

Service with the name, speaking for himself. There is no large number of settings and options. Convert file from the DjVu to PDF can literally two clicks.

Ready file you just download it. By the way, the service allows you to convert a bunch of different file formats in exactly the same bunch of others.