Technical SEO

Resizing Images

Resizing images in the context of web performance means reducing the pixel dimensions of an image to match the actual display dimensions on a page, avoiding unnecessary data transfer from serving oversized images. Responsive images using the HTML srcset attribute allow browsers to download the appropriately sized version based on device screen size.

Image resizing opportunities are flagged by Google PageSpeed Insights and Lighthouse under the "Properly size images" audit. Tools like Squoosh, TinyPNG, ImageMagick, and server-side image processing libraries (Cloudinary, imgix) automate resizing. The impact on LCP scores is monitored via Google Search Console's Core Web Vitals report.

Authority Links

Google Search Docs

How resizing images to display dimensions reduces data transfer and improves LCP.

Web Performance Guide

Using responsive srcset attributes to serve correctly sized images to each device.

Related Terms

Technical SEO

Compressing Images

Refers to the process of optimizing and resizing images in order to increase the loading speed of pages.

Technical SEO

Image Optimization

The process of optimizing images in terms of SEO and user experience is called image optimization.

Technical SEO

WebP

Refers to an image format designed to create files that are smaller for the same quality.

Technical SEO

Website Speed Optimization

Refers to practices to provide faster access to websites.

Referring Domains Rich Snippets (Rich Results)