自由调整 JPG 压缩质量,实时对比体积与节省率,一键导出
点击或拖拽图片到此处
支持 PNG / JPG / WebP,导出为 JPG
拖动滑块自由调整 JPG 压缩质量,实时对比压缩前后的体积与节省率,找到画质与文件大小的最佳平衡点,本地处理零上传。
了解质量参数、体积权衡与常见问题。Quality parameters, size trade-offs, and answers to common questions.
JPG质量调整工具通过 1-100 的质量滑块自由控制 JPG 压缩强度,实时显示压缩前后体积与节省率,并排预览画质差异,满意后一键导出 JPG。
This tool lets you freely control JPG compression strength via a 1-100 quality slider, shows the before/after size and savings rate in real time, previews quality side by side, and exports JPG in one click.
全部在浏览器本地完成,数据不会上传。
Everything runs locally in your browser - nothing is uploaded.
照片分享推荐 70-85,网页缩略图可用 50-70,需要保留细节时用 90 以上;质量低于 40 时画质损失明显,一般不建议。
For photo sharing use 70-85; web thumbnails can go 50-70; keep 90+ when details matter. Below 40 the loss is usually too visible.
JPG 是有损格式,质量越低压缩痕迹越明显;建议保持在 70 以上,并在预览中确认细节可接受。JPG is lossy - lower quality shows more artifacts. Keep it above 70 and verify the details in the preview.
可以,上传 PNG / WebP 后导出为 JPG;透明区域会填充为白色。Yes - upload PNG/WebP and export as JPG; transparent areas become white.
当原图已是高压缩或小尺寸时,高质量重编码可能更大;把质量调低或换用原始文件即可。If the source is already highly compressed or tiny, re-encoding at high quality can grow it - lower the quality or use the original.