Free online image tool
Use the free image resizer to change width or height, keep the aspect ratio, and avoid enlarging small originals.
WebP is a strong default for website images because it usually keeps quality high at a smaller file size. JPEG is practical for photo uploads and forms, PNG is better for screenshots or transparent artwork, and AVIF can be useful when the destination supports newer formats.
A 1600 pixel wide export is enough for many full-width web layouts, while square profile photos often need exact dimensions such as 512 by 512. Keeping enlargement disabled prevents small originals from becoming soft or stretched.
Lower quality settings can shrink photos quickly, but logos, text, and interface screenshots often need PNG to keep edges crisp. The best result depends on whether the image is headed to a website, email, form upload, product listing, or profile.
For many website layouts, a width between 1200 and 1600 pixels is enough for a sharp image without uploading unnecessary file weight. For avatars or profile forms, use an exact square size such as 512 by 512.
Keeping enlargement disabled prevents a small source image from being stretched into a soft result. If a destination requires a larger file, start from a higher-resolution original instead of forcing pixels that are not there.