File extension JP2

File type JPEG 2000 Image Format (ISO 15444-1) Format
Developer Joint Photographic Experts Group

What is JP2 file?

Files with the .JP2 extension contain a compressed bitmap image creating using JPEG-2000 Core Coding. It is different from standardized JPEG files in that it uses a different type of algorithm during compression – one based on discrete wavelet transform – this allows for a non-lossy compression.

Even though JP2 files, also known as JPX files, create a slightly higher quality image than JPG files at a comparable level of conversion and allow for data interlacing, meaning that as the image is being processed, the quality displayed gradually increases, they will not replace JPEG files due to their much higher computational complexity.

Program(s) that can open the .JP2 file


If you cannot open the JP2 file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable application that supports JP2 among those that are installed on your computer.

A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the JP2 file can be found below. Now just download and install the appropriate application.

This site also defines other possible causes causing the problems with JP2 files.

Possible problems with the files that are in the JP2 format

The inability to open and operate the JP2 file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the JPEG 2000 Image Format (ISO 15444-1) Format file. Below is a list of possible problems.

  • Corruption of a JP2 file which is being opened
  • Incorrect links to the JP2 file in registry entries.
  • Accidental deletion of the description of the JP2 from the Windows registry
  • Incomplete installation of an application that supports the JP2 format
  • The JP2 file which is being opened is infected with an undesirable malware.
  • The computer does not have enough hardware resources to cope with the opening of the JP2 file.
  • Drivers of equipment used by the computer to open a JP2 file are out of date.

If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the JP2 file should operate with your programs without any problem. If the problem with the JP2 file has not been solved, it may be due to the fact that in this case there is also another rare problem with the JP2 file. In this case, the only you can do is to ask for assistance of a professional staff.

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How to link the file with an installed software?

If you want to associate a file with a new program (e.g. my-file.JP2) you have two ways to do it. The first and the easiest one is to right-click on the selected JP2 file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK.

Is there a universal way to open unknown files?

Many files contain data in the form of text or numbers. It is possible that while opening unknown files (e.g. JP2) a popular Windows simple text editor, which is Notebook will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.