Resize an image online without losing quality

Before you start, here is exactly what this tool does: it resizes by the longest side only. You enter one number, the longest side is scaled down to it, and the proportions are kept. It cannot crop, stretch, or set an exact width-by-height. If you need precisely 800 by 600, use a photo editor instead.

Open the image compressor

How to resize an image

Drop your JPG, PNG or WebP onto the compressor. Up to 5 at a time on the free plan.
Type a number into “Max width/height (px)”. A 4000 by 3000 photo with 1600 entered becomes 1600 by 1200.
For JPG and WebP, keep quality around 75–80%. PNG ignores the quality slider.
Press Compress, check the before and after size, then download.

Images are never enlarged. If you enter a number bigger than the image’s longest side, it stays as it is.

Can you resize without losing quality?

Honestly, not in the strictest sense. Making an image smaller throws pixels away, and saving as JPG or WebP compresses it with some loss. Even 100% quality is not lossless for JPG. In practice, though, shrinking a photo by a modest amount at 75–80% quality usually looks the same on screen at the size people will actually view it.

What does visibly hurt quality is shrinking far more than needed, or resizing a copy that has already been resized. Always start from your original file; each run here does. And never enlarge a small image: it only adds blur, which is why the tool refuses to.

PNG is the exception on format: it stays lossless, so for PNG the only change is the pixels removed by resizing.

Choosing a size

On screen: pick a size a little larger than the biggest it will be displayed. Around 1200–1600 px on the longest side is generous for most screens.
Email or upload forms: a smaller longest side is the quickest way to cut file size. Check the destination’s stated limit, then adjust and run again.
Printing: keep more pixels. Do not shrink an image you plan to print.

What the tool cannot do

No cropping, no exact dimensions, no changing the aspect ratio, and no “target file size” mode. The free plan limits output to 2000 px on the longest side (a blank max box means 2000); Pro, a $9 one-time payment, keeps full original resolution.

Resize an image now