How are the credits counted when using Autoptimize?
The image optimization service by Autoptimize optimizes and serves images on the fly via a fast CDN with a global presence.
To optimize an image, a ShortPixel Image Optimization credit (or API call) is used. Once the image is optimized, it is stored for 30 days on the ShortPixel servers and it can be served, via CDN, an unlimited number of times during these 30 days. Once 30 days have passed since the image was first optimized, it will be dropped from storage and a new credit will be used to process it again.
Note that unlike ShortPixel Adaptive Images, Autoptimize doesn't smart-crop nor resize the images. That's why Autoptimize usually spends less credits. This can be good if serving adaptive images is not a priority for you, but if is and you care about your SEO, we recommend checking out SPAI.
Here are some examples:
- Simple one-page website with a total of 20 images. As soon as a user enters your site, Autoptimize and our CDN will optimize all of the images, therefore a total of 20 credits will be used each month and there is no need to purchase any plan as the monthly free plan of 100 images is enough to cover the monthly used credits.
- A small website with 4,000 images. Each image of your website will be optimized and stored on our servers when it is first accessed (by a visitor or by Googlebot, for example). If an older post isn't accessed then no image optimization credit will be used. Up to 4,000 image optimization credits will be needed monthly regardless of how many times the images are accessed. A "SHORT" $4.99 monthly plan will suffice.
Note that both one-time and monthly credits can be used to optimize images.