省墨打印

去除大面积彩色背景并加深文字对比度，适合讲义、发票和报销材料打印。核心处理在你的设备上完成，文件不会上传服务器。

Upload a colorful PDFLarge continuous color backgrounds are detected locally.

Background removal strength

Conservative65%Strong

Lower strength protects small colored elements. Higher strength removes more background regions.

All pixel analysis and PDF rebuilding run locally. The output is image-based; selectable text layers are not retained.

100% 浏览器本地处理