DJVU File Extension

DJVU file icon
DjVu Image
  • Developer
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    4.3 (12 votes)

What is DJVU file?

Files with DJVU extension contain colourful high resolution images of scanned pages of a book, magazine, comic book, catalogues, etc.. The main advantage of the DJVU format is its high level of compression, with a very high resolution and quality of stored images, maintained at the same time.

Additional information

DJVU is based on segmentation of the content and structure of the IFF format. Within separate layers, it stores images, background images, and sometimes also an OCR text layer, which facilitates fast navigating across the document, and enables to quickly copy and search for fragments of text. DJVU format (orig.: French „déjà vu”), is characterised with a very high level of compression – even 10 times higher than in case of JPEG. DJVU format encodes both text and image data. The DJVU compression in lossy, thus while storing a scanned image, some data is being lost permanently.

According to some opinions, the DJVU format is better that competitive PDF format, due to a much lower volume of files while maintaining similar quality of scanned images.

DJVU compression

Compression in DJVU is efficient due to the fact, that the image is being divided into multiple single images, compressed separately. Every image is initially divided into 3 images:

  • a background image – usually of a lower resolution, compressed with an IW44 compression algorithm
  • a foreground image – also in a low resolution, similarly as in case of the background image – it is compressed with an IW44 compression algorithm.
  • a mask image – a high resolution image. It utilises the JB2 compression method, which identifies the identical elements on a page (for instance: shape of a given letter), compresses and stores the locations of a given Shape on a page – instead of compressing the same letter multiple Times (as a bitmap).

Programs that support DJVU file

Conversion of a DJVU file

When you install one of the applications from the list of programs that you found here, you should be able to open or edit the file with the DJVU extension without any issue. However, if you still have problems with this, you may use the option of DJVU file conversion to a different format.

File Conversions from DJVU extension to a different format
File conversions from other format to DJVU file

We hope we helped you solve the problem with the DJVU file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.

What else may cause problems?

There can be more reasons which determine that you are not able to open the DJVU file (apart from the lack of the proper application installed).

First - the DJVU file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the DJVU file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the DJVU file should be solved.

Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the DJVU file has not been completed and it cannot be opened properly).

Do you want to help?

If you have additional information about the DJVU file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on DJVU file.

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