How to resize an image without losing quality

"Resize without losing quality" is a slightly misleading phrase. Shrinking an image barely costs anything — you're throwing away pixels you didn't need. Enlarging always costs quality, because the extra pixels have to be guessed. So the honest goal is: shrink cleanly, and avoid enlarging unless you have to.

Shrinking: the easy direction

Going from 4000px to 1600px wide, the tool averages groups of original pixels into each new one. Detail that's too fine to show at the new size is gone, but everything you can actually see is preserved. This is why a downscaled photo often looks *sharper* on screen than the original — there's less noise per displayed pixel.

Keep the aspect ratio locked so nothing distorts, and if you're resizing for the web, run the result through Compress Image afterwards.

Enlarging: the hard direction

There's no way to recover detail a camera never recorded. Upscaling interpolates between existing pixels, which fills the space but adds softness. If you must enlarge:

• Go up modestly — 1.5× to 2× is usually acceptable, 4× rarely is.
• Sharpen Image a little afterwards to restore some edge contrast.
• Accept that it won't match a native high-resolution shot.

Keeping proportions

The aspect ratio is width ÷ height. Lock it and set one dimension; the other is calculated so circles stay round and faces don't stretch. Unlock it only when you deliberately want to squish or stretch — which is almost never.

If you need a *different* shape rather than a different size, that's a crop, not a resize — use Crop Image.

Do it now

Open Resize Image, enter the width you need with the ratio locked, and download.