Canon EOS R7 CR3 files: tested result
Result for this file
Preview only
This file opened, but the raw sensor data could not be decoded by the engine. What you can show is the JPEG preview the camera stored inside the file, at 6,960 × 4,640 pixels (32.3 MP). Engine message for this file: “Canon CR3 (ISO BMFF / CRX) is not decoded yet”.
The numbers
| Camera | Canon EOS R7 |
|---|---|
| File format | CR3 |
| Sample tested | 443A0157.CR3 (full size) |
| Sensor data | n/a |
| Embedded camera preview | 6,960 × 4,640 pixels JPEG (32.3 MP, 1,853 KB) |
| Result | Preview only |
| Developed picture | n/a |
| Decode + develop time | n/a |
| White balance in the file | n/a |
| Colour calibration for this model | n/a |
What this means for you
Use it to cull: you can view, rate and sort these photos by their preview. Do not use the preview to judge fine focus or to edit: it is a small JPEG, already processed by the camera. For full-quality work, export a JPEG from the camera's own software or convert to DNG first.
Limits of this test: one sample file per camera, one compression mode (full size). Another mode or firmware can behave differently. Times come from one run on a Linux desktop PC and will differ on your computer. Whether Windows itself shows these files depends on Microsoft's RAW Image Extension and your camera model; we did not test that. Tested 2026-10-31. Rawlook engine (photocraft-raw 1.0.1).
Open it now in your browser
The free viewer on this site opens these formats in your browser. Your photo is not uploaded.
Browse a whole folder
Rawlook is our Windows app for browsing a whole folder of RAW photos, rating the keepers and exporting JPEGs. It works offline and does not edit your RAW files. Files that only decode to a preview are shown with a “Camera preview” badge.
Rawlook is in preparation for the Microsoft Store.
FAQ
Why does my CR3 file open as a preview only?
The engine could not decode the sensor data for this file type: Canon CR3 (ISO BMFF / CRX) is not decoded yet. The camera always saves a JPEG preview inside the file, so viewers can still show the photo.
Will the preview be the same size as my photo?
For this sample the preview is 32.3 MP. The sensor size could not be read because the raw data is not decoded.