How to zip or resize an image file

How to resize image raw files

Can you resize raw files?
In digital photography raw files are not actual images, in fact they contain raw data captured from image sensor. Raw files are translated to imagery in the development process (so called "de-bayering"), much like negative slides are converted into real printed images using a darkroom in film photography. That's why you can't basically resize raw image files as such. To resize a raw file, first convert ("develop") it into another format like TIFF or JPEG.
How to resize a raw file on Mac?
To resize a raw file, first export it into a TIFF or JPEG. On Mac for most of the modern digital cameras you can use the native Preview app:

  1. Tap with 2 fingers on the file to access options sheet.
  2. Choose "Open with", select "Preview.app"
  3. With the raw file opened in Preview app, locate "File" menu in top menu, select "Export", make sure "Format:" option is selected to JPEG, click "Save".
  4. Open your TIFF or JPEG in Preview app, click "Tools" and select "Adjust size".

How to zip a raw file

Can you zip raw files?
You can zip raw files just like any other files.

To resize a raw file on Mac:

  1. Tap on a file (or multiple files selected) with 2 fingers (or tap with one finger holding down the Control key on your keyboard) to call for drop-down menu.
  2. Select "Compress [file name]".
  3. Your zipped raw files will be automatically placed next to your original raw files after zipping.

To resize a raw file on Windows:

  1. Right-click one or multiple selected files with your mouse or trackpad to call for drop-down menu.
  2. Choose "Send to", select "Compressed (zipped) folder".
  3. Your zipped raw files will be automatically placed next to your original raw files after zipping.
Does zipping raw files reduce quality?
Zipping raw files doesn't reduce the image quality, uncompressed files will preserve the same data stored in your original raw file. By using zip compression you can only achieve a file size reduction by around 10% and those files will require unzipping (decompression) each time you want to edit or convert them.
Photographer? Reduce RAW file size to free up time and money on storage
Photographer? Reduce RAW file size to save time and money on storage
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