Why do images look different when posted through Sendible?
My image looks compressed and pixelated
Social sites, especially Facebook & Instagram, prioritise fast-loading images over high-quality ones, which is why you might experience that your images look compressed after being posted to your social account.
Facebook & Instagram will automatically resize and format your photos, so they’ll display properly on their site and in the apps.
For example, if you post a single photo, it will show on your news feed with a resolution of 476 x 714 pixels regardless of its original size. Unless you upload your photo at that exact resolution, Facebook needs to do some scaling. However, if you upload your photo at that resolution, it will look awful if someone clicks on it to see it zoomed in.
Facebook recommends three width sizes: 720 pixels, 960 pixels, and 2048 pixels wide. For photos, the ideal size would be 2048 pixels wide.
Instagram recommends using a photo no wider than 1080 pixels and an aspect ratio between 1.91:1 and 4:5 for the best resolution.
When you share a photo on Instagram that has a width between 320 and 1080 pixels, Instagram will keep that photo at its original resolution as long as the photo's aspect ratio is between 1.91:1 and 4:5 (a height between 566 and 1350 pixels with a width of 1080 pixels). If the aspect ratio of your photo isn't supported, it will be cropped to fit a supported ratio. If you share a photo at a lower resolution, Instagram will enlarge it to a width of 320 pixels. If you share a photo at a higher resolution, Instagram sizes it down to a width of 1080 pixels.
The colours look different in my image
The colour of the image can change due to having a colour profile set for your image that is not for internet use, e.g., CMYK rather than RGB.
CMYK refers to the primary colours of pigment - Cyan, Magenta, Yellow, and Black - which are mainly used for printing.
While RGB refers to the primary colours of light - Red, Green and Blue - used in monitors, television screens, digital cameras and scanners.
Hence if you're trying to upload a CMYK image online (such as through Sendible), the photo might display in different colours, as web applications do not support CMYK.
Because of this, the correct colour profile to use is RGB or sRGB, if you would like your images to display the colours as intended across all computers.