Site Management Tools Image Compression
Compressing images speeds up page load times and uses less bandwidth. There are four levels of image quality with increasing levels of compression. Typically, the decrease in quality is unnoticeable to viewers.
The quality levels are:
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High (minimal compression)
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Optimum (ed)
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Standard
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Low (maximal compression)
For website images, such as banners, logos, and promotional images, compression is managed at the website level or folder level.
The benefit of applying compression to a folder instead of the website is that you can use different compression settings for different images. Subfolders inherit the compression settings of parents, and parent settings supersede those of subfolders.
If you set compression at the website level, the settings only apply when images are accessed from the website. If you set it at the folder level, compression settings apply regardless of where the image was accessed. For example, website-level compression settings don't apply when images are accessed from SuiteCommerce InStore (SCIS), but folder-level settings do apply.
Image compression creates a compressed copy of the image the first time it is accessed and does not change the original image. The compressed image is cached internally or stored on the CDN if you're using one. For more information, see CDN Caching.
Which Images Get Compressed?
When you define compression settings on a folder or website, images must meet certain criteria to be compressed. Image compression works for JPGs only. Files need to be between 500 kb and 5 MB and stored in the File Cabinet. Images stored outside NetSuite and linked to on your website can't be compressed. Item images get compressed automatically when resized, regardless of other compression settings applied to the website or folder. For more information, see Image Resizing and Compression.
You can shrink file sizes even more by stripping out metadata (such as camera details or the date and time a photo was taken) and using chroma subsampling, which reduces color information in favor of luminance data.