Reading time: 6 minutes. Views 1.3k. Published 08/07/2017
Hi all! If you often download on the Internet e-books and manuals, you have probably already encountered such an e-book format as djvu. As a rule, many people immediately have the question of how to open djvu. It would seem that an ordinary viewer should be suitable for these purposes. pdf files, but not everything is so simple. To view deja vu files you need special programs who know how to work with this format. In most cases, such e-books contain graphs, formulas and drawings that are very difficult to convert to another format for editing. I would like to note that this format It was developed quite a long time ago, about 15 years ago, and managed to gain great popularity. E-books in the deja vu format contain both graphic images and text and are very light in weight.
Advantages of the Djvu format.
Before we figure out how to open djvu, let's take a little look at the advantages of this file format. As a rule, the most important advantage is that the files are very light in weight, while the quality remains high.
What we get:
- An image scanned into the Djvu format is compressed 10 times more than the popular . And the most important advantage is that the scanned document will be of impeccable quality without any blurring or loss;
- Saved in déjà vu format, the scanned color document will weigh approximately 50 KB. And if the paper medium contained only text and a black and white image, then its electronic version will weigh approximately 10 KB. If you scan the same document and save it in another format, for example, Jpeg or tiff, then the weight of the electronic document will be tens or even hundreds of times greater;
- Unlike, in a Djvu format book it is possible to conduct a full search, thanks to a special text layer. Moreover, if the book contains some kind of background, you can remove it if desired.
As you can see, this e-book format has many advantages, but this was more informational information, since now our task is a little different.
How to open djvu on a computer.
There are not many programs that can work with Djvu files, but there are also universal solutions that can open files of almost any e-book. There are also editor programs that allow you to make changes to déjà vu files, as well as create your own books.
WinDjView
Many users have this program in their arsenal, since it has proven itself only with positive side.
You can download the program from the official website of the developer – ru.windjvu.com 
The program has a Russian interface. By the way, when installing WinDjView, search engine Yandex offers to install its elements, as well as . Here you can refuse such an intrusive offer by unchecking the appropriate boxes. 
The main program window has a menu bar and a toolbar. It provides functions such as:
The program can work with several e-books at once, opening each of them in a new tab. WinDjView allows you to read a document in full screen mode, and you can only use the mouse to turn pages. If there is very small text on the pages of a book, you can use magnifier.
In the program settings in the “Display” tab, the user can easily correct the colors of the image to suit his vision.
Here you can enable color inversion. This way you can read white text on a black background. 
DjVu Reader
Another rather old program for reading déjà vu files. By the way, the program has not been supported by developers for quite a long time, namely since 2005, but still remains in demand among many users. Therefore, if you are still wondering How to open djvu, then DjVu Reader will certainly help you.
You can download the program on the official website of the developer - djvureader.org 
DjVu Reader does not require installation on your computer and is launched from the downloaded folder with files. Therefore, if you need to quickly open an e-book, then download this reader and use it. 
Pay attention! Since the program has not been supported by developers for quite a long time, it may not work entirely correctly on new versions of the operating system. Windows systems.
STDU Viewer
This program is the most universal solution than the readers described above. Since it can work not only with Djvu files, but also with PDF, EPub, FB2 and many other e-book formats. This makes the program an incomparable leader among other similar solutions, since you do not have to keep several different utilities on your computer.
You can download the program on the official website of the developer: www.stduviewer.ru 
Pay attention! To use the program for free, during installation you must check the box “I will not use STDU Viewer for commercial purposes.”
Also, when installing the reader, you can specify what types of files it will work with. To do this, check the boxes in the “Associate extensions” window. 
STDU Viewer is liked by many users for its well-thought-out interface, which allows you to comfortably work with e-books. In the working window of the program there are many toolbars, with the help of which the user can easily customize the program to suit his needs.
The program has the following settings:
- Selecting the document display mode;
- Adjusting brightness and contrast;
- Quick search according to the document;
- Copying text if there is a special layer in the document;
- Text highlighting;
- Restoring an open document in case of an emergency termination of the program;
- Setting up page division (horizontally or vertically);
The program also has a number of settings, which can be accessed by going to the “File” - “Program Settings” menu. 
As you can see, STDU Viewer is powerful tool on working with deja vu files, with a huge amount settings, having this reader in your arsenal, you will not have any questions about how to open djvu.
Let's summarize.
Today we looked at three wonderful programs that can work with e-books in Djvu format. I advise all e-book lovers to have at least one of the described programs in their arsenal, since if you have them, you will no longer have questions about how to open djvu.
DjVu Reader is an easy-to-use, low-power viewing tool graphic files DjVu format.
DjVu format (from the French déjà vu - “already seen”) - storage format graphic images with losses. It was developed in the late 1990s by AT&T specialists. This format was originally created for storing scanned copies of books, magazines, and newspapers. The format is also effectively used for storing documents for which design details are important.
The DjVu Reader program is built using an open source library source code DjVuLibre. The program does not require installation; it is launched from the archive unpacking directory.
DjVu Reader allows you to simultaneously work with several DjVu documents. Please note that the tabs with document names are located not at the top, as is now common in most programs, but at the bottom, which seems somewhat unusual, but is no less convenient.
Functionality of the DjVu Reader program
The program menu consists of only two items: “File” and “Help”. In the “File” menu, operations are available to open a file, exit the program, and clear the list previously open documents. In the “Help” menu, a short information about the program is available, from which it is clear that the program was developed by our compatriot Dmitry Garkaev.There are two groups of image manipulation operations available on the toolbar: view mode and page mode. In viewing mode, you can choose to show the background, foreground, mask, or the entire color image separately. In Page mode, you can choose how pages are grouped when displaying a file.
The zoom bar and page navigation bar are also located on the Quick Access Toolbar.
Each of the panels discussed can be closed and then reopened from the “Toolbar” menu located at right side viewing areas.
To the left of the viewing panel there is another service panel, which can operate in one of four modes:
- information;
- setting;
- preview;
- content.
So, the considered program for viewing files in the DjVu format is a lightweight and extremely simple utility for reading documents, while having all the necessary functionality.
DjVu Reader is a lightweight program for enjoyable reading.
DjVuReader And WinDjView- optimal tools for reading DjVu format. They have an extremely simple interface and provide many tools for setting up viewing modes.
Sumatra PDF And STDU Weaver- multifunctional software, copes well with opening files in different text and graphic formats. If you plan to view more than just Deja Vu, choose one of these utilities.
Universal Viewer is a powerful media processor that can not only open, but also modify almost any file. An excellent option for users who want to read books, listen to music and watch videos in one program.
How to open djvu on Android or online?
CoolReader And FBReader- small programs for smartphones and tablets. A good alternative to computer applications. First can read aloud. Second- contains a text translator.
Please note that you can also find various online reading services on the Internet.djvu, one of the most popular is Djvu.js Viewer. There are also special additions to browsers, for example, a plugin DjVu Browser Plug-in from LizardTech, supporting Chrome, Firefox, Opera. There are also various web resources on the RuNet where you can convert Deja Vu into any format convenient and suitable for you.
The selection does not include several good e-book viewers: IrfanView, Okular, Evince, ABBYY FineReader Pro, Adobe Acrobat Reader, Foxit PDF.
- viewer program electronic documents DjVu format. Allows you to read files in a user-friendly style as a continuous document, a one- or two-page document, or a simulated book with brightness and contrast adjustments. Allows you to copy parts of a document to the clipboard. There are two types of document navigation: page-by-page and using the table of contents. A bookmark function has been implemented that allows you to avoid opening multiple versions of a document. There is a hotkey setting that makes viewing a document quick and convenient. It is possible to view documents from a browser.
Advantages and disadvantages of DJVU reader
Portable version, does not require installation;
+ minimum requirements to computer resources;
+ the ability to make tabs without opening new windows;
+ convenient control both from the keyboard and using the mouse;
+ floating control panel;
+ Russian localization and manufacturer support;
– there is no support for drug’n’drop technology.
Key Features
- viewing DjVu files;
- support navigation using document content;
- page navigation;
- screen scaling;
- support for two-page viewing mode;
- support full screen mode viewing;
- imitation of viewing a document in the form of a book;
- viewing book pages as thumbnails;
- setting brightness and contrast;
- copying document fragments to the memory buffer.
The DJVu format is used in digital libraries. This resolution compresses illustrations with a loss of quality, but is necessary to convey the nuances of the source text. In this article we will analyze in detail why this size is needed and how to open a DJVu file on a computer.
General description of the DJVu format
Users are often interested in questions about what the format is and how to open a DJVu file. To create such a file, the source (text, drawing, diagram) is first scanned, then the DJVu technique is used to compress the drawing.
The scanned copy is decomposed into three layers: foreground and background, one-bit mask. After this, compression occurs using wavelet technology and the JB2 algorithm. As a result, we get a document of 15 KB in size.
The file is saved in two versions: conversion with loss of quality and without loss in formats: PNG, JPEG or TIFF. There are two ways to open DJVu; we’ll tell you more about them below.
History of origin
Image conversion technology was developed by Yann LeCun, Leon Botu and Patrick Heffner at AT&T Labs between 1998 and 2001. In 2000, the rights to the invention were purchased by LizardTech, and in 2009 by Cuminas.
Since the program is developed as open source, it is used on different software. GNU has licensed the DJVuLibre library with tools for encoding and viewing documents.
How and with what to open a DJVu extension file
DejaVu files are available for viewing on Mac platforms OS and Windows. There are two methods to open a DJVu file: install the program or view it online. Let's consider software products for each method.
Open DJVu on your computer
Format viewers are divided into three types:
- universal;
- special;
- converters.
We present a list of tools for opening a DJVu file on various versions of Windows.
On Windows 10
The utility will help you open a DejaVu file on Windows 10. To work with the document you need:
- download, unpack and run the program;
- In the upper left corner, click “File”, select “Open” (or use the hotkey combination “CTRL + O”) and specify the location of the document on your computer.
On Windows 7
Now let's see how to open the DJVu format in Windows 7 build. Without special utilities it won't work out. This program has analogues that can be used to read such files. and the most popular and reliable of them. They are used in portable format or installed on a desktop. The programs have a clear interface with tabs, standard features for this type of application (demonstration in a horizontal plane, page rotation, selection by text).
It is not difficult to launch DejaVu format documents using this software; you only need to complete two steps.
- Go to the "File" section.
- Click on the “Open” button and select the required document.
You can make it even simpler - go directly from Explorer, but to do this you first need to set up an association with the installed software.
On Mac OS
Texts, e-books and illustrations saved in DejaVu format are included in this operating system can't open without help third party programs. You will need to download additional software, for example, DjVu Reader.
- After installation, run the boot file and press the “⌘+O” keys.
- Through the window that appears, launch the document of interest.
DJVu online
There is nothing easier for a DejaVu file than viewing it in a browser: there is no need to install additional software or manually convert the document. Let's consider online resources for viewing the DJVu format, how to discover what functions are available. The rollMyFile website will help you open DJVu online.
- Click the Choose captcha to select the file.
- Then click “Open it now”.
- The document will open in a new window. The program changes the settings, searches the document, and scales the size.
Another way to open a DJVu file online is to go to the DJVu Viewer Online service.
Document management is carried out using buttons on the screen. Available functions include zooming and page navigation.
What other problems could there be with the DJVu file?
If you were unable to open a document of the specified format online or in a desktop program, archive it and run it in the viewer through the archive. Perhaps the reason is that part of the code is damaged, and the archive will fix the problem.