Display Images Faster on All Devices

Optimization reduces an image’s byte size while keeping the perceived image quality as close to the original image as possible. The optimization feature determines the best width and image format to use based on the user’s device, browser, and operating system.

This feature is available for sites that use the Salesforce CDN. Our CDN is enabled by default for sites that use enhanced domains. You can also configure custom domains to use the Salesforce CDN option. If you have an existing custom domain on a shared certificate, we recommend that you switch it to a single certificate. There's no downtime when you switch from a shared to a single certificate. On the Domain Edit page, select the option Single certificate for content delivery network (CDN).

The image optimization feature supports JPEG, PNG for images with transparency, GIF, and web image formats. It doesn’t support Photoshop (PSD), RAW, or SVG formats.

Use these recommendations when you upload images.

• Use images with a width of 2,000–4,000 pixels.
• Keep the image’s file size between 200 KB and 2 MB.
• Use the sRGB color profile.
• Keep the total pixel count of animated GIFs under 100 million pixels for sites hosted on Experience Delivery. The total pixel count is the sum of all frames (width × height × number of frames).

To disable this preference, in Experience Workspaces, under Administration | Preferences, deselect Optimize cached images for guest users on all devices.