Image cache storage refers to the space used to store your processed images on Imgix's servers. When you render an image and apply transformations, the resulting images are cached (stored) so they can be delivered quickly to your users without having to re-process them each time. This storage counts toward your Management credit usage at 2 credits per GB.
Cache reads occur when your cached images are accessed and delivered to end users. Every time someone views an image on your website or app, it's "read" from our cache and delivered through our CDN. These reads are part of your delivery bandwidth and count toward your Delivery credit usage at 1 credit per GB.
Transformations are any changes or enhancements applied to your images or videos through Imgix. This includes standard adjustments such as resizing, cropping, and format conversion, as well as advanced and premium features such as background removal, upscaling, face detection, and video encoding. Each transformation uses a specific amount of credits depending on its complexity - from standard renders (1 credit per 500 operations) to premium AI-powered features (2 credits per operation). You can apply multiple transformations to a single image, and they can be combined in a single request. Please see the chart above for a full breakdown of credit costs per transformation type.
You can view your current credit usage and balance directly in your dashboard. We also plan to provide customers on contract-based subscriptions monthly usage statements in the future.
Yes. Different transformations and actions use varying amounts of credits. Please see the chart above for the full breakdown.
You'll automatically receive email alerts when your credit usage reaches 80%, 90%, and 100%. These notifications help you stay ahead of your usage and avoid surprises.
Running out of credits should never be a surprise. When you reach 80% and 90% of your credit balance, we will email you to make sure that you're aware that you might be getting close. For self-serve subscriptions, you can upgrade your plan anytime at a prorated rate to access more credits. If you expect your usage to return to normal the following month, you can downgrade again before the next billing cycle. For contract subscriptions, contact your customer success manager to request additional credits.
We have a credit calculator on our pricing page that you can use to estimate credits. Alternatively, you can make use of our free trial to see how many credits you use, or you can reach out to us at any time and we will help you calculate.
For the purposes of delivering an estimate, we have used data from across all our customers to determine median volumes of image transformations.
There are a few best practices that can help you maximize performance while minimizing credit usage. Please see our Best Practices Guide for more information on how you can get the most out of Imgix.
Credit prices vary based on your bundle size. Smaller bundles start at $0.40 per credit, and the price decreases with larger bundles.
Each Imgix feature uses a specific amount of credits based on the type of action or transformation. Here's a breakdown of how credits are consumed:
* A standard render may include multiple transformations as a single operation. For example, one standard render may include contrast, sharpen, crop and compress as part of a single operation that would be charged at 1/500th credit.
Note: There are no partial credit charges. So, 1 credit allows up to 500 standard renders or up to 50 advanced renders. For example, 120 advanced renders = 3 credits