How to Resize an Image to Exact Dimensions

By Daniel · Updated July 2026

"Image must be no larger than 2000 pixels." "Profile photo: 400 by 400." Every so often something demands an image at a precise size, and the photo straight off your camera is nowhere near it. Resizing is quick once you know the one trap to avoid.

The trap: aspect ratio

If you force a wide photo into a square without thinking, everyone in it gets stretched or squashed. Keep the aspect ratio locked and you change the size without distorting anything — the image just gets smaller or larger as a whole. Only turn that off when you genuinely need exact width and height and don't mind cropping or squishing.

How to resize

  1. Open the Image Resizer and drop in your picture.
  2. Type the width or height you need, with the aspect ratio locked so the other dimension follows automatically.
  3. Download the resized image.

One honest limit: making an image bigger than it started can't invent detail that was never captured, so blowing a small image up will look soft. Shrinking, on the other hand, almost always looks clean.

Image Resizer
Resize an image to exact pixel dimensions. Free, nothing uploaded.
Open the tool →

Common questions

How do I stop the image looking stretched?

Keep the aspect ratio locked while you resize. That changes the size without distorting the picture.

Can I make a small image bigger?

You can, but it will look softer — enlarging can't add detail that wasn't in the original.

Keep reading

Compressing an image · Removing photo metadata · Converting HEIC photos