Why does my image look blurry after resizing?

Almost always because it was enlarged past its original size, or it was saved as a low-quality JPG. Start from the biggest original you have and keep JPG quality around 80 or higher.

Does resizing to fewer pixels lose quality?

Downscaling discards detail you will not miss at the smaller size, so it looks clean. The visible loss comes from upscaling or heavy JPG compression, not from shrinking itself.

Which format keeps the most quality?

PNG and WebP are lossless or near-lossless, so they preserve the most detail. JPG is smaller but lossy. For photos, a high-quality JPG or WebP is the usual sweet spot.

How to Resize an Image Without Losing Quality

The short version

You cannot add detail that is not there, so making an image bigger than its original size always softens it. Making an image smaller is where "without losing quality" is realistic, and the tricks below keep a downsized image looking crisp.

Shrink, do not enlarge

If your source is 4000 by 3000 pixels and you need 1280 by 960, you are throwing away pixels, and the result stays sharp. If your source is 600 by 450 and you need 1280 by 960, the browser has to invent pixels, and the result gets blurry. When you need a bigger image, start from the largest original you have rather than upscaling a small copy.

Keep the aspect ratio

Stretching an image to a shape it was not shot in is the fastest way to make it look wrong. Keep "lock aspect ratio" on so the width and height stay in proportion. When a target shape is fixed, like a YouTube thumbnail at 1280 by 720, use the preset with "cover" so the image fills the frame and the overflow is cropped instead of squished.

Pick the right format

JPG is best for photos. It is small and universally accepted, but it is lossy, so avoid saving the same JPG over and over.
PNG is lossless and keeps transparency. Great for logos, screenshots, and graphics with sharp edges, but larger for photos.
WebP gives you PNG-like quality or JPG-like photos at a smaller size. Use it when file size matters and your destination supports it.

Control quality instead of guessing

When you save a JPG or WebP, the quality slider decides how much detail is kept. Somewhere around 80 is usually indistinguishable from the original while cutting the file size a lot. If you have a hard size limit, the Target KB mode finds the highest quality that still fits, which beats guessing a number.

One export, not five

Every time you re-save a JPG it loses a little more. Do your resizing and cropping, then export once. If you think you will need the image again later, keep the original file and re-export from it rather than from a compressed copy.

Frequently asked questions

Why does my image look blurry after resizing?: Almost always because it was enlarged past its original size, or it was saved as a low-quality JPG. Start from the biggest original you have and keep JPG quality around 80 or higher.
Does resizing to fewer pixels lose quality?: Downscaling discards detail you will not miss at the smaller size, so it looks clean. The visible loss comes from upscaling or heavy JPG compression, not from shrinking itself.
Which format keeps the most quality?: PNG and WebP are lossless or near-lossless, so they preserve the most detail. JPG is smaller but lossy. For photos, a high-quality JPG or WebP is the usual sweet spot.