.cr3

What is a .cr3 file?

CR3 is Canon's newer RAW format — replacing CR2 in modern cameras, built on the ISO Base Media File Format.

Safe format
Type Image
By Canon
MIME image/x-canon-cr3

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What is it

You're shooting with a newer Canon camera — EOS R, R5, R6, R7, R10, or similar — and the RAW files are .cr3. This is Canon's modern RAW format, replacing CR2 with a new container based on the ISO Base Media File Format (the same foundation as MP4 and HEIF).

CR3 offers improved compression options (including Canon's lossy C-RAW mode for smaller files with minimal quality loss), faster read/write speeds, and support for features like Dual Pixel RAW data for focus fine-tuning. The new container format also future-proofs Canon's RAW files as the industry moves toward standardised media containers. Internally, the sensor data is still the same unprocessed capture — full dynamic range, full colour depth.

Adobe Lightroom (subscription) supports CR3 from all Canon cameras. Canon's Digital Photo Professional (free) handles CR3 natively with Canon-specific features like Digital Lens Optimizer. Darktable (free, open-source) supports most CR3 variants. Make sure your editing software is up to date — CR3 from newly released cameras may require the latest version.

Technical details
Full Name
Canon RAW 3 Image
MIME Type
image/x-canon-cr3
Developer
Canon
Magic Bytes
N/A
Safety
.cr3 is a known, safe format.
What opens it
Adobe Lightroom
Subscription All
Canon Digital Photo Professional
FREE All
darktable
FREE All
FAQ
Is C-RAW (lossy) as good as full RAW?
C-RAW files are 30-40% smaller with minimal quality loss. For most photography — including professional work — C-RAW is indistinguishable from full RAW. The difference only becomes visible in extreme shadow recovery or heavy pushing of underexposed images.
Why can't my software open CR3 files?
CR3 requires updated software. Make sure Adobe Lightroom, darktable, or your RAW processor is current. Older versions may not recognise CR3 from newer Canon cameras. Canon releases DPP updates for new camera support.
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