The photos you upload are automatically resized to fit the parameters of the playing fields. These sizes are, for horizontal images, 960 (width) x 640 (height) pixels (large), 540 (width) x 360 (height) pixels (medium), and 250 (width) x 167 (height) pixels (thumbnail). Vertical images are 360 (width) x 540 (height) pixels and 167 (width) x 250 (height) pixels. Note: No large images can be used for vertical puzzles. Puzzleattic highly recommends that you crop and resize your image to 960 x 640 pixels before uploading to avoid stretching/squeezing during the automated resizing process.
To assure that your puzzle images maintain proper aspect ratio you must provide cropped and/or resized images within the size limitations detailed above. Below are examples of what can happen if this step is not taken.

IMAGE FORMAT: Only ".jpg" or ".jpeg" image files will be accepted by the uploader.
Other formats, such as .png, .PSD, .TIF, etc. will be rejected during upload.