Choose the right pixel dimensions before resizing

When this is useful

A useful resize begins with where the image will be displayed. Website thumbnails, email banners, and social images have different aspect ratios and pixel needs. The number of pixels affects sharpness and download weight; changing an image’s pixel width does not automatically change a print layout’s physical size.

A reliable workflow

Keep the aspect-ratio lock enabled to preserve proportions. Entering a new width calculates the corresponding height. Unlocking the ratio stretches the image rather than cropping it. If a composition needs a different shape, crop it in an editor first. Enlarging a small source cannot recover detail that was never present.

Upload the image you want to resize. Enter a new width and/or height. Keep aspect ratio locked or unlock for custom crop-free stretch. Download the resized image.

What to check before you finish

Compare the result at its intended display size and inspect faces, logos, and small text. Allow for high-density screens when choosing a source size, then run the image compressor if the resized file is still heavy. This browser tool limits dimensions and total pixels to reduce memory failures on phones.

Keep the next step simple

Open the Image Resizer above to try the workflow. Your input is processed in your browser, without an account or file uploads. The related tools below can help with the next step; check the output before publishing it or adding it to a production system.