我的书签
添加书签
移除书签Key concepts
Last updated Apr 21, 2026 Here is a summary of the key terms that we use throughout our guides.
| Term | What this means |
|---|---|
| Remote image | An image that is stored outside of Images storage, including images in R2. |
| Transformation | A request to optimize a remote image that is stored outside of Images. |
| Origin | The location where your image is stored. When you optimize a remote image, Cloudflare will pull the original image from the origin and store it in cache. |
| Hosted image | An image that is stored in Images. Cloudflare dynamically serves copies of your original image, optimized based on your requirements. |
| Parameter / Option | A parameter is a type of optimization that you can perform on an image. An option is the value for the parameter. For example, you can set the width parameter to a value of 100 to resize an image to a width of 100. |
| Variant | A predefined way to specify how a hosted image should be resized. For example, you can create a variant called "thumbnail" that sets image dimensions to 100x100. When you serve images with this variant, Cloudflare will serve a version of the original image that is resized to 100x100. Predefined variants specify a limited set of parameters: width, height, fit, and blur. |
Was this helpful?
YesNo
On this page
Docs{"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/images/get-started/key-concepts/#page","headline":"Key concepts","description":"Definitions of core Cloudflare Images terms including transformations, variants, hosted images, and origins.","url":"https://developers.cloudflare.com/images/get-started/key-concepts/","inLanguage":"en","image":"https://developers.cloudflare.com/images/get-started/key-concepts/og.png?v=2a0ac976eebadf94","dateModified":"2026-04-21","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
description: Supported file formats, size limits, and dimension constraints for Cloudflare Images. title: Limits and formats image: https://developers.cloudflare.com/images/get-started/limits/og.png?v=fd40367c60b8ec44
Documentation Index
Fetch the complete documentation index at: https://developers.cloudflare.com/images/llms.txt
Use this file to discover all available pages before exploring further.
