Resize an image online

Change an image to exact pixel dimensions with high-quality browser resampling and optional aspect-ratio locking.

Choose an image to resize

JPEG, PNG, WebP, and other browser-readable images

How to use this tool

  1. 1.Choose an image and review its original dimensions.
  2. 2.Enter a new width or height and keep the aspect ratio locked if desired.
  3. 3.Resize and download the image in a matching web format.

Private by architecture

Create correctly sized website images, email attachments, thumbnails, and social media graphics.

Processing runs inside your browser with WebAssembly. The selected media is not uploaded to Konverton, and the result stays on your device unless you choose to save it.