Djvu file opener. Working with DjVu files: irreplaceable programs for reading, converting and creating DjVu

Hello dear readers of the blog site. Probably, you have met scanned books in Djvu format (their files have the same extension).

Usually, in this way, not fiction is distributed on the network, but books containing drawings, graphs, formulas and other things that are rather difficult to digitize using text recognition programs.

At first I thought that this strange djvu () format was just a collection of bitmaps (photographs) that were obtained from scanning a book. But in this case, the file size would be very large, and we do not observe this.

What is a file with such a mysterious extension and how can it be opened in order to start reading the information contained in the "déja vu", and what programs are best used in this case. I will try to answer all these questions in this article.

What is a Djvu file

It turns out that djvu was developed about fifteen years ago and is a very successful mixture of test and graphic formats. In principle, when digitizing books, two scenarios are possible:

Recognize text on a scanned page and save it using compression algorithms, which allows you to get a very low weight of the final file. The disadvantage is that images, backgrounds, margins, curled corners and other things that can be important in some cases are lost. But on the other hand, it will be possible to conduct a full-fledged search using the recognized texts.
You can save scanned texts as pictures, for which such or tiff are suitable. However, in this case, the weight of even one scanned page will be excessively high if we want to maintain quality. Well, it will also be impossible to search through texts.

The advantages of the methods described above are combined in Djvu, while having practically no drawbacks. Format Deja vu can be classified as text-graphic, which in itself already sounds unusual, but promises a lot of dividends. Judge for yourself:

The original scanned image is compressed in Djvu ten times more densely than it would be using JPEG, and at the same time its quality remains practically unchanged. At the same time, jpeg will necessarily blur both the text and graphics, and everything that is possible, and our hero will leave everything in its original form.
An A4 sheet scanned and converted into deja vu will weigh in the region of 50 kilobytes (read about that), if the source was with color graphics (or background), and in the region of 10 kilobytes - if it is black and white. Babble, and this is in view of the fact that the scan was carried out in high resolution 300 DPI. The same file, saved in tiff format (without loss of quality), would weigh several hundred times more.
The Djvu file contains a text layer on which you can conduct a full-fledged search, and if you wish, you can leave only it (removing the color mask and background information), which will reduce the size even more.

All this is achieved thanks to a rather original approach. I could be wrong, but in my opinion it is as follows:

Separate the text of the page and its background. The algorithm monitors many factors and, with the right settings, can even rip the text from the cover of a magazine, where words can also be used as a background.
The text is saved in one-bit (black and white) and compressed quite tightly.
The background is kept separately, which is compressed a little less efficiently.
Information about the color of the text and the illustrations used in the book is also compressed, but using a different algorithm.
As I mentioned earlier, the Djvu format provides a separate text field, thanks to which you can search the scanned books.

But the issues of creation and principles of data formation in déja vu files are of interest to us insofar as, and it will be much more interesting to find out how they can be open and read Djvu.

Naturally, for this purpose, special reading programs (readers) are used, which have a place to be both for a computer and for mobile devices based on Android or iOs (ipad, iPhone). It is convenient, after all, on the way home or to work, to raise your level of education by reading a smart book on your mobile phone.

How to open Djvu - programs for reading on a computer

There are several programs that are focused on working only with déjà vu files, and there are a number of universal solutions that allow you to read books in almost any form. There are also Djvu editors that allow you to adjust or even create your own masterpieces.

Among the Déjà Vu readers designed for a computer, it is worth highlighting the following readers:

It fully supports the Russian language, and the "great and terrible" Yandex even managed to loosen it up, forcing you almost by force and by default search in all your browsers:

In general, they make it possible to abandon all this wealth (including), but not everyone pays attention to this when installing the program. Of course, for the same one, all this looks even more intrusive, but the leading search engine of the Russian Internet has also already filled all free programs with its add-ons for the most "don't play around".

As I mentioned, in Djvu a text layer can be sewn, therefore, when reading books containing it, you can search for words and phrases.

On the left of WinDjView there is a navigator with page thumbnails, and at the top there is a toolbar where you can open a new file, change the scale and type of displaying pages (an endless ribbon or imitation of a book spread), and rotate them, if necessary, by an angle multiple of 90 degrees.

What is remarkable, this déjà vu format reader opens new books on new tabs, which allows you to work with several materials at once in one program window. It is also possible to make bookmarks and leave comments (from the context menu of the right mouse button). You can use a magnifier from the toolbar and full-screen view mode (in this case, pages can be flipped with a simple click).

If you select "File" - "Settings" from the WinDjView program menu, then on the second tab you can set the inversion of colors (for example, in order to read white text on a black background), as well as adjust the brightness, contrast or gamma for better perception of the document in Djvu format.

At the beginning of this article, I mentioned that in déjà vu, a scanned document is split into black and white text, background, and foreground color information. So, in WinDjView all this can be clearly seen by choosing "view" - "mode" from the menu.

The latest current version dates back to 2005 (version 2.0.0.26) and its compatibility with modern operating systems is not guaranteed, although it still works on my Windows Vista, though not as fast as its modern counterpart described above. It does not require installation and works directly from the folder where you unpacked the archive with the program.

When installing, you need to check the box that you will not use this reader for commercial purposes, so as not to pay for the program.

Well, STDU Viewer will also ask you which file extensions you would like to associate it with, except for déjà vu.

In principle, this reader does not have something global that would not exist in WinDjView, but ... First, it captivates huge number of formatsthat can be opened and read with this program.

Secondly, a very convenient and well thought-out interface.

Almost all the functionality of the reader is displayed in the form of toolbars located along the entire perimeter of the program window. The place where thumbnails of the pages of the book being read are usually displayed has as many as six tabs located at the bottom.

Not all of them apply to Djvu, but still. The same bookmarks, which can be arranged in the form of a tree, will be able to replace the missing navigation through your handbook or reference book.

The brightness and contrast settings are also displayed as an icon in the lower right corner, where the buttons for switching the document display mode are also located.

Third, there are some nice functional refinements that will help during daily work with STDU Viewer:

Well, and fourthly, this is a huge number of settings that can be made in STDU Viewer so that this reader is fully suited to your habits and needs.

For example, you can customize (File - Program Settings) even the appearance of the tabs, which, of course, is a trifle, but pretty nice:

Djvu reader for Android and iOs (iPad and iPhone)

For some reason, I manage to read books mostly on the road, and there are always a lot of other, more important and interesting things to do. In this regard, I had the task of downloading some suitable deja vu reader for my favorite iPad, received as a gift from the Profit Partner, but also in a compartment to everything - for an Android phone.

At the same time, I try to try all the free versions of programs and applications before coming to the conclusion that I have no other option, how to part with the hard earned ones. Actually, the main candidates for the place of Djvu are readers for iOs on the Internet. DjVU Book Reader.

It seems that everything is fine, both reviews and screenshots, but they ask for a small amount of money (169 rubles) for it. It seemed to me that on this software the light did not converge like a wedge and I entered the word Djvu in the search bar in the Apple Store and asked to filter only free applications.

After testing for opening various files in déjà vu format and evaluating usability and functionality, a clear leader emerged among free programs for iPad - KyBook.

Softinka is unique, in my opinion, because while being free it fully supports EPUB, FB2, PDF, DJVU, CBR, CBZ and audiobooks in MP3, M4A, M4B format.

When reading, the pages turn beautifully (animation can be customized), there are a lot of settings and functionality, such as creating bookmarks, leaving notes, searching by the contents of a book, etc. things that are accessible from the top toolbar.

The KyBook reader has surprisingly many settings:

Including there is a separate group of settings for this reader for PDF and DJVU formats:

In the library of this reader, you can sort books, create shelves for them, move files between them, rename and do everything that is usually required from such programs.

In addition, it is possible to use your existing applications for working with cloud storage such as, or Google Drive.

True, by providing access to your files in Dropbox and other clouds, KyBook warns you that it can even change them, which I personally do not really like.

Therefore I Djvu files are thrown into the Dropbox folder on a computer (via Wi-Fi), after which I open the application of the same name on the Ipad and add them to my favorites so that later they do not go through the mobile Internet, which is not always fast and, moreover, is limited.

It seems to me that it will be safer.

Now it's time to move on to the question of how to open Djvu on Android. The Internet prompted me that the best options are two free applications, which I still use, because I did not have any special complaints about their work, but just left them both - suddenly some twisted deja vu file, one of them was opened can not.

So, I present to you deja vu readers for Android:

Good luck to you! See you soon on the blog site pages

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What is DjVu format

DjVu is the format in which scanned images are stored. It allows you to conveniently view scanned books, magazines and other text documents.

This format is used when working with texts that have many elements that are difficult to recognize. We are talking about formulas, tables, diagrams, figures. In addition, DjVu is suitable for storing textual information, which is not required to be recognized, because it is preserved in its original form. These are, for example, scanned parchments and other historical documents.

Many libraries use DjVu as their primary storage format for digitized books. This is why you need to be familiar with programs that open files of this format.

DjVu software

One of the best utilities is WinDjView. This program allows you to quickly and easily read DjVu documents. WinDjView has a large number of functions: viewing in different modes (single page, continuous, full screen), image rotation, thumbnail viewing, the ability to create annotations and bookmarks. If you have come across the DjVu format for the first time and do not know how to open it, this program is recommended.

Another popular program for working with DjVu is DjVu Reader. It has a simple interface and can be launched without installation: you just need to download the archive, unpack it and open the document. DjVu Reader allows you to work in one and two windows mode, display one or several pages, adjust brightness, contrast and other parameters.

A universal program that will help you open e-books of various formats is STDU Viewer. It allows you to work not only with DjVu, but also with other popular formats (PDF, FB2 and others). Note that versatility is not its only advantage - the program provides all the possibilities for full-fledged work. The user can create bookmarks, manage fonts, view page thumbnails.

You can also open DjVu files using the CoolReader program. It is also used when working with FB2, TXT, RTF, HTML, etc. CoolReader can be installed on Windows, Linux, Mac OS X, Android, Symbian OS and others. In this program, you can view books in different modes and recognize different text encodings. You can also work with CoolReader without installation.

Hello. If you are wondering how to open DJVU files on your computer, then you are in the right place. Today I will show you 3 good programs for working with books in the DJVU format. You just have to choose the one that you like the most.

To open the DJVU file use the program WinDjView, Djvu reader or STDU Viewer... Now I'll tell you more about them and give download links.

WinDjView program

After installation and launch, you can try to open any books in WinDjView format. To do this, click the File - Open menu and specify the location of the book on your computer.

Djvu reader program

Click in the STDU Viewer menu File - Open and select the book.

If you know any other cool programs with which you can open the DJVU file on your computer, be sure to write about them. I will definitely download and try them!

P.S. An interesting fact: if you literally translate the name of the DjVu format from French, then it will be "deja vu", which in Russian means "already seen".

DJVU is one of the most common e-book formats. Scanned documents, magazines and books are distributed in this format. When downloading such files from the Internet, users are often faced with the fact that they do not know how to open a DJVU file. Most computers simply do not have programs installed to work with this format.

In this article, we will look at a number of free programs with which you can open DJVU files, and also briefly talk about this e-book format.

There are not so many programs for working with DJVU, and there are even fewer high-quality and free programs. We will now take a look at a number of free programs. After orally speaking one of them, you will no longer have problems opening DJVU files.

Is one of the best programs of this type. WinDjView is a fast and easy-to-use program for reading djvu documents. The program provides a large number of different functions for convenient work with a document. If you are dealing with this format for the first time and do not know how to open a djvu file, I recommend using this particular program. This way you can avoid unnecessary problems and save your time. Using the link above, you can easily download a free djvu program.

Let's consider the main features of the WinDjView program:

Support for all versions of the Windows operating system, starting from Windows 2000.
View a document in one-page or continuous mode, view in spread mode.
Support for a large number of languages. Among which there is Russian.
Ability to create custom annotations and bookmarks.
View thumbnails of pages.
Opening multiple documents in tabs or in separate windows.
Ability to work in full screen mode.
Support for dictionaries for translating individual words in a text.
Saving pages as separate images.
Rotate the page 90 degrees.
Page display settings. Change the scale, brightness, gamma and contrast.
Control and navigation through the document using the keyboard and mouse.

- another fairly popular program designed to open djvu files. The program has low system requirements, simple interface and can work without installation. To start using DjVu Reader, just download the archive with the program and unpack it into any folder.

Djvu format

Djvu format is for storing scanned images. It was designed for easy viewing of scanned books, magazines, scientific materials and other text documents.

The use of this format is especially important in cases where the text contains a large number of elements, the recognition of which is difficult. Such elements can be formulas, tables, diagrams, figures. Also, this format is often used to store text information that is not intended for recognition. For example, for storing scanned parchments or other historical documents.

For many Djvu libraries, the format has become the main format for storing digitized books. Therefore, it is simply necessary to know how to open a djvu file format. Otherwise, you will not be able to work normally with the digitized versions of many books.

Many users are faced with the need to open DjVu files on a computer. DjVu format, along with PDF format, is the most popular format for storing scanned documents.

The name of the DjVu format comes from the French word déjà vu - "already seen". This format is used to save scanned e-books and journals, mainly of encyclopedic, educational, scientific and technical nature, in which there are many graphics: images, pictures, diagrams, etc. Users scan books with a large number of images, and then save them in electronic form in a DjVu file.

The DjVu format has gained popularity, in part due to the fact that a DjVu file weighs much less than a similar PDF file. This is especially true for mobile devices and also useful for the computer. Files of very large size can hardly be opened even by specialized programs - viewers for files of this type.

Therefore, in many cases, it is optimal to save documents and pictures in the DjVu graphic format. A DjVu document is several times smaller than a similar file saved in PDF format.

How to open DjVu file? In this article, I will explain how to open a DjVu file on a computer in the Windows operating system. To do this, we need a program that opens DjVu files.

What program can open files with the DjVu extension? To open files in the djvu format, you can use specialized programs for opening files in the DjVu format, or applications that support the opening of several types of text file types, including "djvu". Some services support opening.

In this article, I will introduce 5 programs. Two programs: WinDjView and DjVu Reader, are specially designed to view the djvu format, and three others: STDU Viewer, Sumatra PDF, Universal Viewer Pro have support for several formats, including DjVu.

WinDjView to view DjVu files

The free WinDjView program is designed to view DjVu files on a computer. There is a version of the application for the operating system Mac OS X (macOS) - MacDjView. Install the program on your computer, or use a portable version of the application that can be launched from anywhere on the computer, or from an external device, for example, from a USB flash drive.

WinDjView program works in Russian.

Key features of WinDjView:

Create bookmarks
Brightness and contrast control
Export an entire page or part of a page to a graphics file
Selection and copying to the clipboard (if there is a text layer)
Rotation, scaling, easy navigation
Continuous scrolling
Printing support

In this image, a DjVu e-book is open in the WinDjView window.

You can read more about the capabilities of the WinDjView program.

DjVu Reader - View DjVu

The free DjVu Reader is the oldest application created for viewing DjVu e-books. The program has English interface. There is a crack for installing the Russian language. DjVu Reader does not require installation on a computer, the application is launched from a folder.

Main features of DjVu Reader:

Working in one-window and two-window display modes
Support for page index and document content
Finding information in the text
Keyboard control support
Copy to clipboard
Full screen view mode

In this image, a file with the DjVu extension is open in DjVu Reader.

STDU Viewer - opening e-books in DjVu

The free program (for personal use) is designed to open a large number of formats. It is a universal viewer that supports opening DjVu files.

From the official site, you can download a regular or portable (portable) version of the application.

STDU Viewer has the following main features:

Opening text and image files
Quick and advanced document search
Scaling, page rotation
Adjusting brightness and contrast
Bookmarking an open book
Select and copy to clipboard (if there is a text layer)

In this image, a DjVu e-book is open in STDU Viewer.

You can read more about the STDU Viewer program.

Sumatra PDF to view DjVu

Free program - file viewer for a large number of formats. Despite the word PDF, Sumatra PDF supports viewing DjVu files. Sumatra PDF can be used as a universal viewer for e-books.

On the application developer's site, the regular and portable versions of the program are available for download.

Sumatra PDF has the following functionality:

Support for a large number of formats
Open files quickly
View and print a document
Document search
Copy text function
Hotkey support

In this image, a DjVu book is open in Sumatra PDF.

To see all the features of Sumatra PDF read the article.

Opening DjVu in Universal Viewer Pro

The free (for Russian-speaking users) program supports viewing a huge number of formats, including DjVu.

Regular and portable versions of the application are available for download.

Key features of Universal Viewer Pro:

View a large number of text formats
Support and playback of audio and video formats
View over 40 graphic formats
Opening files larger than 4 GB
Printing support

In this image, Universal Viewer Pro has opened a DjVu file.

Read more about the capabilities of the Universal Viewer Pro program.

Conclusions of the article

With the help of free programs: WinDjView, DjVu Reader, STDU Viewer, Sumatra PDF, Universal Viewer Pro, you can open a file in DjVu format on your computer. These applications have their own settings for comfortable viewing of e-books in DjVu format.