About this image resizer
Import an image and type a target width or height: with "Lock aspect ratio" checked, editing one side recalculates the other from the original proportions so nothing gets stretched. Scaling uses Canvas high-quality resampling; export as PNG or JPEG (JPEG fills the background with white).
The original dimensions and the output size are always visible so you can confirm the result. Typical uses: fixed-size avatars and thumbnails, or shrinking oversized screenshots to a sensible width. Everything runs locally — images are never uploaded.