Follow these steps for Size-oriented resizing:

1. Click on the up arrow to upload the image.
2. Enter the new width and height in pixels.
3. Enter the image quality (1-95). For higher compression, set quality to 10-50.
4. Click Upload and resize.
5. Once the image appears, click the download button below it to download.

For Target KB-oriented resizing, enter the target KB after uploading and click upload and resize.