去除PDF多余的白边或裁剪特定区域。可视化拖拽选择范围，应用到全部或指定页面。
Trim margins and whitespace from PDF
Free outputs include a small "Processed by Konomic" footer. Upgrade to remove →
Drag & drop files here, or click to browse
PDF · up to 50 MB (free)
Upload your PDF
Choose auto-detect or set custom margins (top, right, bottom, left)
Preview the crop result
Download the cropped PDF
Remove unwanted margins, whitespace, or borders from your PDF pages. Use auto-detect to find content boundaries automatically or set custom crop margins for precise control.
Slightly — the content area shrinks but the underlying data stays similar. For bigger savings, combine cropping with compression.
Yes. Specify page ranges so headers or footers are only removed from the pages you choose.
Yes. Auto-detect finds the content boundaries by analyzing pixel density, so it works on both text and scanned image PDFs.
See how Konomic compares to popular crop pdf tools:
上传PDF
拖拽选择保留区域
点击「裁剪」
下载裁剪后的PDF
无隐藏费用，无需信用卡。基础工具永久免费。
TLS加密传输，欧盟服务器处理，文件一小时内自动删除。
大多数操作几秒内完成，无需排队。
直接在浏览器中使用，不占用设备空间。
电脑、手机、平板均可流畅使用。
文件绝不用于AI训练，绝不与第三方共享。
不会。裁剪只改变页面显示范围，内容本身无损。
选择自动模式即可检测内容边界并去除多余白边。
