Compress an Image for Your Website
Images are usually the heaviest thing on a page, and a slow hero photo is the single most common reason a site feels sluggish. Visitors leave before it even paints.
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PNG, JPG, WebP, GIF, AVIF, HEIC — up to 50MB each
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Why image weight controls page speed
On most pages the largest element is a photo or banner, so it directly sets your Largest Contentful Paint, the moment the main content appears. Google watches LCP as a core ranking and experience signal.
Every uncompressed image is bandwidth the visitor pays for and your server pays for. On mobile data a 3 MB hero can take seconds to arrive, and seconds are enough for people to bounce.
Compressing images is the highest-return speed fix because it cuts the most bytes for the least effort, often shrinking a page by half.
Compress, then go modern with WebP
Start by running each image through compress JPEG to strip the obvious waste from camera files. That alone often cuts size by 60 to 80 percent.
For a bigger win, convert to WebP. WebP files are typically 25 to 35 percent smaller than JPEG at the same quality, and every current browser supports them.
Pick the format to match the image. JPEG and WebP suit photos, while flat graphics and logos belong in PNG or SVG; the MDN guide to image types covers the tradeoffs.