Image format
Canon’s earlier CIFF-based raw files, requiring a decoder for the original camera data.
Explore the format
Choose a target format for your Canon CRW images.
Marked paths may need steps such as flattening, rasterization, tone mapping or animation loss.
Choose a source format to convert to Canon CRW.
Canon Raw / Camera Image File Format
CRW stores Canon raw images using Camera Image File Format, or CIFF. Directory records describe data blocks and capture information. It belongs to earlier Canon digital-camera workflows and is not the same container as later CR2 or CR3. Retaining the original file is important when interpreting a legacy photo archive.
CRW metadata uses CIFF records rather than assuming a standard TIFF Exif layout. Some editing information can be stored by Canon software in additional records. Decoder and metadata-tool support must match the format; a JPEG preview does not replace the original raw data.
Use the raw original for repeated photographic development when exposure interpretation and colour decisions need to remain flexible. Export JPEG for an opaque delivery image or a suitable high-precision raster for further editing. Those exports bake in processing choices and cannot recreate the original sensor data, calibration or all vendor metadata.
Raw development interprets capture values using colour calibration, white balance and a tone curve; mosaiced data also needs demosaicing. A built-in preview is already rendered and can look different from a fresh raw development. More bit depth does not recover clipped exposure or establish a ready-to-display HDR image.
CRW metadata uses CIFF records rather than assuming a standard TIFF Exif layout. Some editing information can be stored by Canon software in additional records. Decoder and metadata-tool support must match the format; a JPEG preview does not replace the original raw data.
Raw formats evolve alongside camera sensors, recording modes and development software. These milestones connect this format family to the camera and processing workflows that use it.
Different formats, different trade-offs. Choose for the image and the workflow.
DNG provides a published container for camera raw data and calibration information. It can simplify supported raw interchange, but conversion does not guarantee that every proprietary maker note or processing feature will remain usable.
JPEG makes a compact photographic delivery file, but ordinary JPEG discards detail and has no alpha. Keep the richer source for editing and use JPEG when the receiving workflow expects an opaque photo.
TIFF provides tagged raster storage with multiple images and several sample types and compression schemes. It is a useful interchange choice for scanning and high-precision editing, but the receiving tool must support the particular TIFF variant.
PNG preserves decoded pixels losslessly and can carry alpha. It is useful for transparent graphics and screenshots; it does not preserve editable document layers or camera sensor data, and photographic files can be large.
CRW stores Canon raw images using Camera Image File Format, or CIFF. Directory records describe data blocks and capture information. It belongs to earlier Canon digital-camera workflows and is not the same container as later CR2 or CR3. Retaining the original file is important when interpreting a legacy photo archive.
CRW metadata uses CIFF records rather than assuming a standard TIFF Exif layout. Some editing information can be stored by Canon software in additional records. Decoder and metadata-tool support must match the format; a JPEG preview does not replace the original raw data.
No. CRW uses CIFF, including directory-relative data offsets. It needs appropriate CRW parsing and cannot be converted by changing the suffix.
Check the exact camera model and recording mode in the processor’s support list. Raw support is model-specific, even when the extension is recognised. Viewing an embedded JPEG preview does not prove the sensor data has been decoded.
Raw-to-image export develops the data: white balance, colour mapping and tone become part of the pixels. Grayscale, palette and SDR targets can discard additional information. Keep the original; converting a rendered image back into a raw container cannot reconstruct the capture.
Use the raw original for repeated photographic development when exposure interpretation and colour decisions need to remain flexible. Export JPEG for an opaque delivery image or a suitable high-precision raster for further editing. Those exports bake in processing choices and cannot recreate the original sensor data, calibration or all vendor metadata.