PDF Margin Auto Crop tool intelligently detects and removes unnecessary blank margins around pages with a single click, making documents more compact and easier to read. It is especially suitable for printing worksheets, e-books, scanned files, and office documents, helping reduce paper waste and improve the reading experience. All processing is performed locally in the browser without uploading files, ensuring document privacy and security. Real-time preview is also supported, allowing you to review the cropping result of every page before exporting.