裁剪 PDF
拖动选择要保留的区域，裁剪每一页。
使用方法
上传您的 PDF，在预览中拖动选框到要保留的区域，然后下载结果。相同的裁剪会应用到每一页。
裁剪区域是如何计算的？
您绘制的选框会按页面宽高的百分比计算，然后应用到每一页——因此即使各页尺寸不同，裁剪比例也保持一致。
我可以撤销裁剪吗？
裁剪只会改变可见区域（页面的裁剪框）——请始终保留原始文件，因为此工具在副本上操作，下载之前不会修改任何内容。
Can I crop each page differently?
No — one crop area, measured as a percentage of the page, is applied uniformly to every page in the file.
Does cropping delete content outside the box permanently?
The content outside the crop box is hidden from view, and your original file is never modified — always keep the original if you might need the full page later.
Will cropping change the file size?
Usually only slightly — cropping changes what's visible, not the underlying embedded content, so don't expect the significant size reduction that Compress PDF provides.
Can I type exact crop measurements instead of dragging?
No — selection is drag-only, there's no field for entering millimeters or inches. For a precise crop, zoom in on the preview in your browser first so the box lines up exactly where you want it.
Does cropping resize the page, or just hide part of it?
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