IIQ File Extension
Phase One RAW Image
- File Type iiq
- Developer Phase One
- Popularity
- Application Capture One
- Category Camera RAW Files
- Format Binary
What is a IIQ file?
Phase One RAW Image, identified by the IIQ extension, is a Camera RAW Files type and includes 51 files.
Phase One A/S, the developer of the Phase One RAW Image (IIQ), has released file format and 2 programs designed to handle them.
IIQ files are compatible with various operating systems, including Windows, Mac OS and Linux. There are 7 programs available to view a IIQ file, including popular tools like Capture One, PaintShop Pro and Adobe Lightroom.
Programs that support IIQ files
How to open a IIQ file?
If you are having trouble opening a IIQ 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.
Capture One, PaintShop Pro and Adobe Lightroom are recognized as the most popular software solutions for dealing with IIQ files. If you wish to install the latest release of Capture One, visit the official Phase One A/S portal and download the edition that works on any operating system.
Once Capture One is installed, the OS should configure it as the default tool for opening IIQ files.
Set Capture One as the default IIQ handler
Setting a default program by file type in Windows
- Right-click on your IIQ file and choose the "Open With" option. Then click "Choose another app" to continue the process;
- In the pop-up window, find and select the Capture One application from the available options;
- Make sure the "Always use this app" checkbox is checked and click "OK" to confirm your choice as the default app for opening IIQ files.
Choose an app to open a file on Mac
- Right click or use Control + left click on the desired IIQ file to launch the file options menu;
- Select "Open in application" and click "Other";
- Towards the bottom of the window, find the "Enable" menu, which is already set to the default option, "Recommended Programs";
- In this menu, select "All Programs" and search for Capture One. Check the box next to "Always open in app" to make it the default option.
How to edit a IIQ file?
Editing IIQ files requires installing professional software that lets you open and edit camera raw files. Online editors have more limitations compared to dedicated Phase One RAW Image programs.
List of Top IIQ editors 2026
According to these factors, we have compiled a list of available IIQ editors.
| IIQ Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| PaintShop Pro | Corel | Windows | 4.6 out of 5 (41 review) |
| Capture One | Phase One A/S | Windows | 4.4 out of 5 (37 reviews) |
| darktable | darktable team | Linux | 4.2 out of 5 (35 reviews) |
| Adobe Lightroom | Adobe | Windows, Mac OS | 4.1 out of 5 (40 reviews) |
Convert to and from IIQ
If a IIQ file is cumbersome, converting it to formats such as TIFF, DNG, RAW or other supported types can make it easier to manage.
Converting a IIQ file may not fully retain all functionality, but it is generally possible to return it to the original format.
Convert IIQ to other file formats
Effective solutions for IIQ file problems
If IIQ files are giving you trouble, small modifications to your software can help. Check out the troubleshooting tips below to fix these issues.
What are the possible solutions to recover a corrupt IIQ file?
Start a data recovery program and open the damaged IIQ file. Go to the menu and select the "Repair" option to repair the file. Allow the recovery process to complete, which will automatically repair the damaged camera raw files.
Are there any symptoms that my IIQ file is damaged?
Corrupted IIQ camera raw files may show the following signs:
- Opening the file in Capture One or other programs causes them to hang or crash;
- Error dialogs are displayed when interacting with the file;
- Opening the file results in an error or a failed attempt;
- Unexpected expansion of the total size of the IIQ file;
- Editing the archive in Capture One is accompanied by slow performance or delays;
What are the possible causes of Capture One crashing?
Lack of software updates is a possible reason behind Capture One crash. Keep your Phase One A
Restarting your computer can resolve numerous common problems, so it should be the initial step before changing any software-related settings.