How to Resize an Image Online — Keep Quality & Proportions

Resizing changes an image's pixel dimensions (width × height). It affects three things at once: file size (fewer pixels = smaller file, faster loading), physical fit (matching a target layout exactly), and usability — oversized images are the #1 reason pages feel slow. Most photos taken on modern phones are 3000–8000px wide, far more than any screen needs.

There is no single "correct" size — it depends on where the image will be shown. These are reliable starting points for the most common situations.

The aspect ratio is width divided by height (for example 4:3 or 16:9). When you resize, keeping the ratio locked scales the image evenly — it never gets distorted. Unlock it and the image can be squashed or stretched. A landscape photo forced into a square without cropping will look squashed; crop it instead.

Resizing scales the whole image down: everything stays, just smaller. Cropping cuts away parts of the image to change its shape or remove clutter. Use resize when you want the same picture at a smaller size; use crop when you want a different shape (e.g. a square avatar) or to remove unwanted edges. Often you crop first, then resize to the exact target dimensions.

Open the Resize tool, drop your image, and enter the exact width/height (preset sizes are one click). Keep the ratio locked unless you deliberately want to distort. Everything runs locally in your browser — your photos never leave your device. After resizing, you can convert the result to WebP in the same session for an even smaller file.