使用这款免费在线转换器，将 JPG（JPEG）图片转换为 WebP。在相同质量下，WebP 的文件大小通常比 JPEG 小 25–35%，因此它成为网页图片的默认选择。
所有处理均在本地完成，因此您的图片绝不会被上传到服务器。
如何使用此工具
添加 JPG
将您的 JPG 拖放到工具上，或点击选择文件。
选择质量
WebP 已默认选中。从 75% 质量开始，再根据需要进行调整。
对比效果
查看并排预览，确保质量看起来合适。
下载
下载更小的 WebP 文件，即可用于网页。
本节目前仅提供英文版本。
What actually changes when you convert JPEG to WebP
This is the most straightforward win in image compression: both formats are lossy and both are designed for photographs, so you are comparing two encodings of the same kind of content. At matched visual quality, WebP is typically 25–35% smaller than the equivalent JPEG.
WebP also adds something JPEG never had: an alpha channel. That matters when a photograph needs a transparent area, which previously forced you into PNG and a much larger file.
Do not convert twice
If your JPEG has already been compressed — which almost every JPEG has — converting to WebP does not undo that. The existing artefacts are carried across and re-encoded, and re-encoding a lossy image always loses a little more. The saving in file size is still real, but the image does not get better.
For the best result, go back to the original: convert from the camera raw, the PNG, or the PSD rather than from a JPEG that has already been through one compression pass.
Quality settings that matter
- Around 75 is the usual sweet spot for photographs — noticeably smaller than 90, with artefacts most people cannot see at normal viewing size.
- Below about 60, flat sky and smooth skin begin to show banding and blocking.
- If a photograph will be viewed full-screen on a high-DPI display, bump the quality up rather than down; the browser scaling hides less than you would expect.
常见问题
为什么要将 JPG 转换为 WebP？
WebP 的压缩效率高于 JPEG，因此您可以用更小的文件获得相同的质量。更小的文件意味着更快的页面加载速度和更低的带宽费用。
我可以免费转换为 WebP 吗？
可以 — 这款工具完全免费、无任何限制，也无需注册账号。
WebP 在所有地方都受支持吗？
WebP 受到所有主流浏览器（包括 Chrome、Firefox、Safari 和 Edge）以及大多数图像编辑器和 CMS 的支持。