PDF 裁剪

通过设置自定义边距裁剪 PDF 页面,可在浏览器中去除白边或聚焦于特定区域。

将 PDF 拖拽到此处,或点击选择文件

选择 PDF 文件

最大文件大小:128 MB

所有处理均在浏览器本地完成,您的文件不会上传到任何服务器。

裁剪 PDF 页边距 — 去除白边,每页打印更多内容

Trim the margins of any PDF to fit more content per page, standardize margins across documents, or fix scanned pages with uneven borders. Our browser-side tool lets you set precise crop rectangles — all processing stays on your device. Free, no upload, no sign-up.

100% FreeNo UploadNo Sign-upPrecise Per-Page Crop

使用步骤

Drop Your PDF: Drag any PDF in. Multi-page documents supported. The tool shows page thumbnails with detected margins (approximate, based on visual whitespace).
Set Crop Box: Choose crop mode: 'Auto-detect margins' (intelligently removes whitespace), 'Set uniform margins' (e.g. all sides 10mm), or 'Custom rectangle' (precise x/y/width/height in mm). Per-page overrides available.
Apply Crop: Click 'Crop'. pdf-lib processes the crop box in your browser. Page sizes update, content stays exactly where it was — just with reduced surrounding whitespace. A 100-page PDF crops in under 10 seconds.
Save Cropped PDF: Download the cropped PDF. Content fits more pages per printed sheet. Two-up printing becomes practical for academic PDFs. Form fields and annotations respect the new bounds.

为什么选择此工具

100% Local Processing: Files are processed entirely in your browser using JavaScript — never uploaded to any server.
No Limits: No file count or file size restrictions. Process as many files as your device can handle.
No Sign-up: Free forever, no account needed, no email required. Open the page and start.
Private by Design: Nothing is sent to any server. Close the tab and your files are gone forever.

常见问题

How do I crop margins from a PDF?

Drop your PDF into our PDF Crop tool, set the crop amount (auto-detect, uniform margin, or custom rectangle), click 'Crop', and download. The PDF keeps all its content but the surrounding whitespace is trimmed. Processed in your browser, no upload needed.

Will crop remove content?

Only the content outside your crop rectangle is removed from view. Auto-detect and standard margin crops typically don't remove content. With custom rectangle crop, anything outside the box is excluded — useful for selective content trimming. For safer crops, use auto-detect or generous margins.

Can I crop different pages differently?

Yes — set per-page crops. Use the page selector to apply different crops to cover page, body pages, and appendix. Or apply a uniform crop to all pages in one click. Useful for documents with mixed layouts (e.g., portrait body + landscape figures).

Does it work on scanned PDFs?

Yes — auto-detect works especially well on scans with clean borders. The tool identifies the page edge (where ink starts), crops tight to that edge, and removes scan artifacts. For pages with content bleeding to the edge, use 'uniform margins' or 'custom rectangle' to preserve the bleed.

Will my PDF be uploaded?

No. pdf-lib handles all cropping locally. For academic papers, exam materials, and confidential reports, the file stays on your device the entire time.

What happens to form fields?

Form fields respect the new page bounds. If a field extends outside the crop rectangle, it remains in the form field dictionary but is not visible (it would be rendered off-page). For PDF forms with fields near edges, preview the crop before applying to catch this edge case.