Resize an Image

Making an image smaller removes pixels, but with multi-step downscaling it usually looks just as sharp at its new size. Enlarging is different: the extra pixels are interpolated, so the result looks softer. That's why Don't enlarge smaller images is on by default.

Keep Lock aspect ratio on and set only the width or the height. If you need an exact width and height with a different shape, choose Crop to fill or Fit inside instead of Stretch. Crop trims the edges; Fit inside adds padding.

Resizing changes the dimensions in pixels, such as 4000 × 3000 to 1600 × 1200. Compressing keeps the dimensions and stores the pixels more efficiently. For the smallest files, resize to the size you need first, then compress if necessary.

Yes. It works in current Chrome, Safari, Edge and Firefox on phones and tablets, with no app to install. On iPhone and iPad, images above about 16.7 megapixels are scaled down automatically to fit Safari's canvas limit, and the result tells you when that happens.

No. Pixellin resizes images inside your browser tab, so the files never travel to a server and are never used for AI training. They stay in the tab's memory until you remove them or close the page.