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Image guide

How to Compress an Image

Reduce image file size while keeping the detail people actually notice.

4 min readSep 1, 2026
Image compression comparison

Image compression makes uploads faster, pages lighter, and storage easier to manage. The best result is not the smallest file; it is the smallest file that still looks right for its job.

Choose the right format

Use JPEG for photographs, PNG when you need transparency or crisp interface graphics, and WebP for a strong all-round web format. Converting formats before compressing can make a bigger difference than repeatedly lowering quality.

Resize before you compress

A 4000-pixel-wide photo rarely needs to stay that large for a website. Set the image dimensions to the largest size your layout needs, then export it with moderate quality. This removes pixels that could never be displayed.

Check the result

Compare the compressed image at its real display size. Look at text, faces, gradients, and sharp edges first. Keep the original until the smaller file has passed your visual and upload checks.

Put it into practice

Compress an image