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KuponGuru

Image Resizer

Resize by pixels or percentage, keep proportions, and batch up to 20 images with sharp Lanczos scaling.

FreeRuns in your browser

About the Image Resizer

Set an exact width, height or both, or scale by a percentage, and every image in the batch is resized with Lanczos resampling — the high-quality method photo editors use, not the browser's quick default. Proportions are kept unless you switch that off.

How to use it

  1. 1Add the images you want to resize.
  2. 2Enter a width, a height or both — or switch to a percentage.
  3. 3Resize, check the new dimensions on each row, and download.

Questions

What does “Keep proportions” do when I set both width and height?

The image is scaled to fit inside that box without being stretched, so one side may come out smaller than you typed. Switch it off to force the exact size.

Can I make an image larger?

Yes, by entering a bigger size or a percentage above 100. Enlarging cannot add detail that was never captured, so a big enlargement will look soft.

Are my images uploaded?

No. The images are processed in this browser tab, using WebAssembly builds of the same open-source encoders Google's Squoosh uses. They never reach KuponGuru's servers, and closing the tab discards them.

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