JP2 File Extension
JPEG 2000 Core Image Format
- File Type jp2
- Developer Joint Photographic Experts Group
- Popularity
- Application GeoExpress
- Category Raster Image Files
- Format Binary
What is a JP2 file?
The JP2 extension is related to JPEG 2000 Core Image Format and is classified in the Raster Image Files category, which contains 575 files.
JP2 file support extends to various operating systems, including Linux, Windows and Mac OS. There are 16 programs available to view a JP2 file, including popular tools like XnView, IrfanView and ACDSee Photo Manager.
MIME types
- image/jp2
File Signature
HEX code: 00 00 00 0C 6A 50 20 20 0D 0A 87 0A 00 00 00 14 66. ASCII code: jP ftypjp2.
Programs that support JP2 files
Windows
Online Services
How to open a JP2 file?
If you are having trouble opening a JP2 file, it usually means the right software is not installed. Choose a program from the list that matches your operating system. Next, visit the official website of the developer, download the software, and install it on your device.
Thanks to their popularity, XnView, IrfanView and ACDSee Photo Manager are often the go-to programs for managing JP2 files. To install the updated version of GeoExpress, simply go to the LizardTech site and download the installer compatible with all major platforms.
After successful installation, your operating system should seamlessly handle JP2 files via GeoExpress.
Setting GeoExpress as default JP2 viewer
Change the default app for a file type in Mac
- Initiate a right click or use Control + left click on the desired JP2 file to open a menu where you can select various actions;
- Choose "Open in Application" and click "Other";
- Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
- Select "All Programs" from this menu and proceed to search for GeoExpress. Check the box next to "Always open in app" to set it as the default option.
Change a default app in Windows
- To get started, right-click your JP2 file, then choose "Open With" and select "Choose Another Application" from the context menu;
- Choose GeoExpress from the available applications listed in the pop-up window to set it as the default application to open your JP2 file;
- Be sure to check the "Always use this app" checkbox, and then click "OK" to confirm your selection.
Tips and tricks to solve problems with JP2 files
JP2 files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.
Why does GeoExpress stop responding or crash intermittently?
Insufficient software updates are a likely cause of GeoExpress crashes. Be sure to install the latest updates for LizardTech products.
Restarting your computer is an essential troubleshooting step that can resolve many common problems. It is recommended to restart your computer before making any changes to the software settings.
What are the best practices for repairing a JP2 file that has gone bad?
Start a data recovery program and open the damaged JP2 file. Then, choose the "Repair" option from the menu. Wait for the recovery process to finish, allowing automatic repair of damaged raster image files.
How can I determine if my JP2 file is damaged?
Characteristics of corrupted JP2 raster image files can include:
- The file stops responding or freezes in GeoExpress or other programs;
- Error notifications appear during file manipulation;
- The file does not respond or shows errors when opening it;
- Unexplained JP2 file size inflation;
- Editing the archive in Adobe Photoshop is hampered by poor overall performance;
How to edit a JP2 file?
To modify JP2 files, you need to install special software that makes it possible to open and edit raster image files. Online JP2 editors are more restricted compared to software designed for JPEG 2000 Core Image Format.
Best JP2 Editor Software in 2026
With the mentioned criteria in mind, we have assembled a selection of JP2 editors.
| JP2 Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Corel PHOTO-PAINT | Corel | Windows | 4.6 out of 5 (45 reviews) |
| GeoExpress | LizardTech | Windows | 4.5 out of 5 (46 reviews) |
| PaintShop Pro | Corel | Windows | 4.3 out of 5 (44 reviews) |
| Adobe Photoshop | Adobe | Windows, Mac OS | 4.2 out of 5 (50 reviews) |
| Filters | Macphun | Mac OS | 4.2 out of 5 (41 review) |
Convert files to and from JP2
If obstacles arise while working with a JP2 file, you may convert it to formats like JPG, JPEG, PNG, TIFF, PDF or other similar types for smoother handling.
After converting a JP2 file, some capabilities may be limited, but you can often convert it back to the original format.
With applications like XnView, Preview and ACDSee Photo Manager, you can convert JP2 files offline while keeping the original quality intact.