图片尺寸调整

点击或拖拽图片到这里

支持 JPG, PNG, WebP 格式，文件大小不超过 20MB

What this tool does

Resize an image to exact pixel width/height. Aspect ratio stays locked by default; unlock to stretch freely. Runs in the browser with Canvas — nothing uploads.

How to use

  1. Upload an image; fields fill with the original size.
  2. Change width or height (unlock aspect ratio if you need stretch).
  3. Download the PNG when the preview looks right.

FAQ

What format is exported?

Always PNG. Photos may get larger than the original JPG — use Compress afterward if needed.

Does upsizing make images sharper?

No. Upscaling only interpolates pixels; soft images stay soft.

More tools in thedeveloper toolbox. For store preview shots, try theApp Store screenshot maker.