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支持格式 / JPG

转换 JPG 文件

将 JPG(JPEG Image)文件转换为 56 种格式。无需安装,浏览器中即可完成。 .jpg · image/jpeg

立即转换

关于这种格式

Made for photographs by the JPEG committee in 1992. Its lossy compression discards what the eye cannot see, which is good for photos and bad for text or line art. Most photos on the internet are jpg.

能承载的内容

  • Photographs (16 million colours)
  • Shooting data (EXIF) — camera, time, location

无法承载的内容

  • Transparency
  • Layers
  • Animation
  • Losslessness — quality drops a little on every save

转换为其他格式时

JPG → PNGQuality stays as it is but the file grows 5–10×. Quality already lost does not come back.
JPG → WEBPSame quality, 25–35% smaller. For the web, go this way.
JPG → PDFThe photo placed on one page.
JPG → HEICHalf the size, but older devices cannot open it.

打不开的时候

  • Actually HEIC with a .jpg extension — sent from an iPhone
  • CMYK jpg — meant for print; some programs show the colours wrong
  • Truncated — the top shows, the bottom is grey

一句话 Every open-and-save of a jpg costs a little quality. Save intermediate work as png, and export jpg only at the end.

常见问题

如何转换 JPG 文件?

把文件拖到窗口里,选择目标格式,然后下载结果即可。无需注册。

需要安装软件吗?

不需要。在浏览器中直接使用。如果需要,也提供 Windows 安装版。

列表里没有的格式也能转换吗?

可以。我们把各引擎能处理的组合合并成一张图,未直接支持的组合会经由中间格式自动衔接,并选择损失最小的路径。