SUN File Extension
Sun Raster Graphic Format
- File Type sun
- Developer Sun Microsystems
- Popularity
- Application GIMP
- Category Raster Image Files
- Format Binary
What is a SUN file?
Sun Raster Graphic Format, identified by the SUN extension, is a Raster Image Files type and includes 575 files.
The Sun Raster Graphic Format (SUN) was created by Sun Microsystems, a company that developed file format and produced 4 programs for their use.
SUN file support extends to various operating systems, including Windows, Linux and Mac OS. If you need to view a SUN file, you can use one of 6 programs, such as XnView, IrfanView and PMView Pro.
Programs that support SUN files
Online Services
How to open a SUN file?
If you’re having difficulty opening a SUN file, it is often due to not having the correct software. To solve the problem, choose a compatible program from the list. Then follow the link to the official developer site, download the software, and install it on your device.
When it comes to opening and working with SUN files, XnView, IrfanView and PMView Pro are the top choices for users. If you need the newest version of GIMP, just access the The GIMP Team website. From there you can download the installer compatible with all systems.
Following installation, SUN files should be automatically opened with GIMP.
Set GIMP as the default SUN program
Changing Default Programs in Windows
- Right-click your SUN file, then navigate to the "Open With" option and click "Choose Another Application" to continue;
- In the pop-up window, select the GIMP application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening SUN files.
Change Default Program on Mac
- Right click or Control + left click on the desired SUN file;
- Select "Open in application" and click "Other";
- Look at the bottom of the window, where you will see the "Enable" menu. "Recommended Programs" will be selected as the default option;
- Within this menu select "All Programs" and navigate to GIMP. Check the box next to "Always open in app" to make sure it’s the default option.
How to edit a SUN file?
To edit SUN files, it is essential to install software that supports not only viewing but also editing the raster image files. Online SUN editors provide limited functionality compared to full-featured software for Sun Raster Graphic Format.
List of Top SUN editors 2026
Taking into account the provided details, we have prepared a list of SUN editors that match your needs.
| SUN Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| GIMP | The GIMP Team | Windows, Linux, Mac OS | 4.6 out of 5 (47 reviews) |
Solve problems with SUN files
When issues arise with SUN files, they can generally be fixed with small software tweaks. Use the troubleshooting tips below to help resolve them.
What can lead to sudden GIMP crashes?
GIMP crashes can occur due to outdated software versions. To mitigate this, install the latest updates for The GIMP Team products.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
What is the recommended approach to repair a damaged SUN file?
Open the damaged SUN file with a recovery program, and then select the "Repair" menu item to start the repair process. Allow the recovery process to complete, which will automatically repair the damaged raster image files.
What are the telltale signs of a corrupt SUN file?
Common indications of damaged SUN raster image files are:
- Unexpected expansion of the total size of the SUN file;
- Opening the file in GIMP or other programs causes them to hang or crash;
- Opening the file results in an error or a failed attempt;
- While working with the file, error messages appear;
- Editing the archive in GIMP results in slow or unresponsive behavior;