图片
压缩 JPG 提升网页速度
体积、先缩放尺寸，以及避免反复有损保存。
Large JPEGs are still a top cause of slow LCP (Largest Contentful Paint) on content sites. Compressing intelligently trims kilobytes without obvious blur.
Resize first if the image is displayed much smaller than its pixel dimensions—shipping a 4000px-wide hero into a 1200px slot wastes bytes.
Prefer one controlled compression pass rather than re-saving the same JPEG dozens of times in social apps.
Panyas Converter’s compress image tool is a quick way to test two quality presets on the same photo before you upload to production.