Opening IIQ Files

The IIQ file type is primarily associated with Capture One.

IIQ	File extension: IIQ
	File type:	raw image

What is an IIQ file?

IIQ files mostly belong to Capture One by Capture One. IIQ is the filename extension of RAW images compressed and stored using the Intelligent Image Quality format and compression standard used by Capture One tethered photography/photo-editing software and Phase One high-resolution cameras. These IIQ files contain minimally compressed graphical data directly captured by the CMOS sensor on the camera. An IIQ file can be compressed as a completely lossless (IIQ L) image or a lossy (IIQ S (Smart)) image. Lossless IIQ images provide the highest possible image quality as it captures images as 16bit signals from the CMOS sensor. Lossless IIQ images can also be captured as 14-bit signals which result in a smaller size. The lossy-compressed IIQ images provide high quality graphics and is in fact "near-lossless". Phase One digital cameras in the IQ4, iXM-RS, iXM, iXU-RS, and iXU series can be used to capture high resolution images in IIQ format when tethered to Capture One.

How do you open IIQ files?

You need a suitable software like Capture One to open an IIQ file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your IIQ file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a IIQ file directly in the browser:. Just drag the file onto this browser window and drop it.

Online IIQ Text Viewer

Choose your .iiq file to analyze

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Online File Viewer

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Programs that open and convert IIQ files:

Capture One by Capture One
See the previous paragraphs to learn more about the main application. IIQ files are often referred to as Capture One camera raws because this type of file is primarily created or used by this software.
Photoshop (raw image) by Adobe
Photoshop is a professional graphics design and photography software. It features a range of tools for retouching/enhancing images and creating designs for digital and print media. Photoshop can be used to open and edit RAW images saved in IIQ format. This file format is classified as Camera Raw. Related links: Phase One RAW files option

IIQ file format:

Each file has a definite file format, that is, how the stored data is arranged in the file. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. File extension, signature and file format must match; otherwise errors will occur when the file is opened. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our examination of the IIQ files comes to the following conclusion:

IIQ is not a common file extension and mainly uses a defined IIQ format. The file formats most commonly found in IIQ files are:

95% of all IIQ files belong to Intelligent Image Quality - Phase One RAW image. The files are using the common file format TIFF. TIFF is short for Tagged Image File Format. It stores raster graphics images that support color depths from 1 to 24-bit, lossy and lossless compression and multiple layers and pages. These files contain neither text nor words, but only data. A typical file size is 100 MB. The file type was developed only in the last few years. Certain words are almost always found in the files, such as IIIICwaR. These files can be linked to camera and flim.

All other IIQ files (5%) have no consistent format. Just click the "Choose your .iiq file to analyze" button on this page to find out what your IIQ file is.

Technical Data for IIQ File Extension

File classification:

Camera Raw

Related files:

liq, png, eip, cos, c1s

Related links:

Phase One RAW files option

Mime type:

image/x-raw-phaseone, image/x-minolta-mrw, image/x-nikon-nef

an iiq raw image is a special file format by Capture One and should only be edited and saved with the appropriate software.

How to solve problems with IIQ files

Associate the IIQ file extension with the correct application.
Update your software that should actually open raw images. Because only the current version supports the latest IIQ file format. Search, therefore, e.g. on the Capture One manufacturer website after an available Capture One update.
To make sure that your IIQ file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .IIQ file online - secure, fast, and no downloads needed.