CR3 is Canon's in-camera RAW
CR3 is the raw sensor data a Canon camera writes at the moment of capture. It's produced by the camera's own hardware and firmware — software can read it, but nothing can manufacture a genuine CR3 from a finished TIFF.
Looking to turn a TIFF into a CR3 file? Here's the honest answer — and what actually works instead.
You can't convert TIFF to CR3. CR3 is a camera's own RAW format — it only ever comes out of the camera.
CR3 is the raw sensor data a Canon camera writes at the moment of capture. It's produced by the camera's own hardware and firmware — software can read it, but nothing can manufacture a genuine CR3 from a finished TIFF.
Your TIFF is a developed, final image. The extra sensor information a CR3 carries — wider dynamic range, full color depth, untouched highlights — was discarded when the photo was first saved, and can't be put back.
CR3 is proprietary to Canon. Even other RAW formats (NEF, ARW, RAF…) aren't interchangeable with it — there is no universal "save as RAW" that produces a real CR3.
Every real RAW file is one of these camera-maker-specific formats, written by the camera itself:
TIFF is a high-quality, often lossless raster format used in photography, scanning and print. Files are large but preserve maximum detail.
How to open TIFF opens in Photoshop, GIMP, Preview and professional imaging software.
Full TIFF format guideCR3 is Canon’s newer, more efficient raw format used by recent EOS cameras — smaller than CR2 with the same flexibility.
How to open CR3 opens in recent Lightroom, Photoshop, Canon DPP and modern raw editors.
Full CR3 format guideLossless with transparency — perfect for graphics, logos and screenshots.
TIFF → PNGA small, universal photo format that opens everywhere.
TIFF → JPGA modern format with small files at high quality for the web.
TIFF → WEBPConvert your CR3 and other camera RAW files to JPG, PNG or TIFF.
Open the converter