All about CR2 files

The CR2 format is one of the so-called RAW formats and is used by digital cameras to allow the greatest possible freedom when editing images on a computer.
RAW formats store a vast amount of data, ensuring that digital images match the complexity of analogue photographs.
CR2 (Canon Raw 2) is a rather uncommon format and can only be opened and converted by specialised software. Consequently (and due to the enormous file size per image), it is not suitable for sharing and should be converted to more common image formats before sending.

CR2 has replaced the CRW format previously common in Canon cameras and is used in all newer Canon DSLRs (digital single-lens reflex cameras). The key factor for shooting in CR2 format is not only the camera, but also the write speed of the memory card, particularly during continuous shooting.

In direct comparison with the camera’s native JPEG, CR2 offers significantly deeper colours. Instead of a range of 1,024 per channel, CR2 allows for 16.7 million values per channel.
Settings such as ISO or white balance can also be adjusted retrospectively in the CR2 format.

Common programmes for opening and converting CR2 files include Photoshop, the RAW Image Viewer, or Canon’s own software in the Canon Utilities.

As with other raw data formats, CR2 is sometimes referred to as a digital negative.

Last updated on 17. March 2026 by Sören with the experience of more than 128,069,391 converted files since 2013.