How to resize an image
- Drop in one image or a whole folder of them.
- Choose how you want to size them: exact pixel dimensions, a percentage, or a maximum for the longest side.
- Leave "keep aspect ratio" ticked unless you deliberately want to stretch the image.
- Press Resize, then save the results individually or as a ZIP.
Questions people ask
Will resizing make my image blurry?
Making an image smaller is essentially lossless to the eye — you are discarding pixels you were not using. Making one larger is a different matter: the extra pixels have to be invented, so the result looks soft. That is why upscaling is switched off by default.
What does "keep aspect ratio" do?
It preserves the shape of the image. With it on, setting a width automatically works out the matching height, so nothing is squashed or stretched. Turn it off only when you genuinely need to distort the image to exact dimensions.
What size should I use for a website?
For a full-width banner, 1920 pixels on the longest side is ample. For an image inside an article column, 1200 is generous. For a thumbnail, 400. Anything larger is bandwidth your visitors pay for and never see.
Can I resize hundreds of images at once?
Yes, and the work is spread across your processor cores so it is quick. The only real limit is memory — if you are resizing a very large batch of very large photos on a phone, do it in chunks.