Convert ~CR to JPEG

CardRecovery may save recovered photographs with the unsupported .~cr suffix, preventing normal viewers, editors, and sharing services from opening them. In many cases the file already contains JPEG data, so changing the suffix or re-saving the recovered image produces a usable .jpg file.

What the ~CR format is

In the Graphics category, .~cr is a recovery filename extension associated with CardRecovery, not a standardized camera-raw format. CardRecovery uses it for data recovered from memory cards; the underlying file may be a JPEG or another image type, depending on what was recovered.

The suffix alone cannot identify the actual format. A recovered JPEG normally begins with the JPEG signature FF D8 FF, and its metadata may still contain the camera model, dimensions, and capture information. A damaged or incomplete recovery may have a JPEG signature but still fail to open.

Do not treat .~cr as .cr, .cr2, or .cr3. Those extensions can identify camera-raw formats from particular manufacturers; CardRecovery's tilde-prefixed suffix has a different purpose.

What the JPEG format is

JPEG is an 8-bit raster-image format supported by web browsers, phones, office software, photo editors, social networks, print services, and most image viewers. Its lossy compression creates compact files suitable for sharing, previews, email, and general delivery.

If a .~cr file already contains JPEG data, renaming it does not recompress the image and therefore does not reduce its quality. Opening and exporting it again as JPEG decodes and recompresses the image, which can add artifacts. JPEG does not preserve transparency and is unsuitable as a substitute for an original raw file or an archival master.

How to convert ~CR to JPEG

First identify the recovered file

1. Make a backup of the recovered .~cr file and work on the copy. Do not write recovered files back to the source memory card.
2. On Windows, enable View → Show → File name extensions in File Explorer so that the complete suffix is visible.
3. Check the content rather than relying on the name. ExifTool can report the detected type with exiftool -FileType -MIMEType "photo.~cr"; on Linux and macOS, the file "photo.~cr" command is also useful.

If the result is JPEG, the file does not need a true format conversion. If it is another supported image type, use an image editor to export it as JPEG. If no tool recognizes it, the recovery may be incomplete or the file may use a different format.

Rename a recovered JPEG without recompressing it

1. Make sure the file is not open in another application.
2. Rename photo.~cr to photo.jpg or photo.jpeg; change only the extension, not the filename stem.
3. Accept the operating system's extension-change warning and open the renamed file in a viewer such as IrfanView, XnView MP, or GIMP.

If the image opens normally, this is the preferred result because the JPEG bytes remain unchanged. Renaming does not repair missing or corrupted image data.

Re-save it with desktop software

Use this method when an application will not accept the original suffix, when the file needs a new color profile or dimensions, or when the recovered data is a valid image in a non-JPEG format.

1. Rename the file to .jpg if the content check identifies JPEG data, then open it in GIMP, IrfanView, XnView MP, ImageMagick, or another editor that supports the detected format.
2. Choose File → Export As or the program's equivalent and select JPEG.
3. Use the original pixel dimensions unless a smaller delivery image is required. Set JPEG quality around 90–95 for ordinary sharing; quality 100 produces larger files without recovering lost information.
4. Select sRGB when the image will be viewed on the web, on phones, or by general-purpose software. Save to a new filename and retain the recovered source.

ImageMagick can re-encode a recognized file from the command line with magick "photo.~cr" -quality 92 "photo.jpg". If ImageMagick does not detect the input, rename the copy to .jpg first and run the command again.

Use an online converter

CloudConvert and Zamzar can convert a standard image after it has been renamed to .jpg or another extension they support, but they may reject the original .~cr name and cannot reconstruct damaged recovery data. Upload the file, choose JPEG as the output, set dimensions or quality if offered, convert, and download the result.

Online processing sends the recovered photograph to a third-party server, so desktop software is preferable for private images, large batches, or files from a sensitive memory card. Do not delete the local recovered copy after downloading the result.

Quality and compatibility caveats

A recovered JPEG that opens after renaming requires no conversion and should retain its original compression and metadata. A re-export may remove some metadata, change the embedded color profile, alter dimensions, and introduce another generation of JPEG compression.

Keep the original recovery output and any camera originals. If the image shows gray blocks, missing sections, unusual colors, or only a thumbnail, the source data is damaged; changing the extension or using another converter cannot restore bytes that were not recovered.