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Image Compression

Definition
Image Compression is the process of reducing the file size of an image without significantly compromising its visual quality. This practice is essential when images are above around 100kb, as larger files can slow down page load times, negatively impacting both user experience and SEO performance.

What is it?
At its core, image compression works by removing unnecessary data from image files. There are two main types: lossless compression, which reduces file size while preserving all original data, and lossy compression, which permanently removes some image details to achieve greater size reduction. By lowering the file size, compressed images require less bandwidth and load more quickly, helping ensure that users do not experience delays when browsing a website. Fast-loading pages are critical not only for a smooth user experience but also for search engine rankings, as page speed is a recognized ranking factor. Tools and plugins available today allow webmasters to automatically or manually compress images during upload or after they are published.

How is it used?
Web developers and content managers use image compression tools—such as online services, software applications, or CMS plugins—to optimize images before they are added to a website. This process ensures that visual content remains sharp while loading efficiently. Regularly reviewing image sizes and compressing large files can help maintain optimal page speed, improve user satisfaction, and contribute to better search performance.

Applicable Areas

Related terms

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