A page full of big photos feels slow on mobile data. Right-sizing images is the quickest speed win.
Resize first
If an image appears 800 px wide, there is no need to upload a 4000 px original. Export at about the largest size it will be displayed, and a bit more for sharp phone screens.
Choose the right format
- JPG: photos.
- PNG: graphics, logos, images that need transparency.
- WebP: a modern format that is usually smaller than JPG and PNG at similar quality, and well supported by browsers.
- SVG: logos and icons, which stay sharp at any size.
Compress
Compression reduces file size, usually without visible loss at moderate settings. Aim for a typical photo under a few hundred kilobytes, and compare before and after.
Lazy load
Images further down the page should load only when someone scrolls to them.
Describe images
Write short alt text: it helps screen readers and search engines.
Name files sensibly
"photo-mug-custom.webp" is better than "IMG_20260802.jpg".
Keep the original
Store the full-quality original separately, so you can export again later.
Free tools on our image toolkit can resize and convert pictures.
