Crop PDF
Crop PDF pages by trimming margins or applying a custom crop box. Your files never leave your device — all processing happens locally in your browser.
Drop your PDF here
or click to choose a file
Your files never leave your device.
72 points = 1 inch. Default 36pt ≈ 0.5 inch.
Cropping sets the CropBox only — the original content is preserved and can be recovered by resetting the crop.
Crop PDF trims the visible area of your PDF pages by setting the CropBox. Trim margins from the edges, or apply a custom crop box with precise coordinates. The MediaBox and all page content are preserved — cropping is non-destructive and can be undone by resetting the crop. The operation runs locally in your browser.
How it works
How to use Crop PDF
- 1Drop your PDF. Drag and drop a PDF file, or click to choose one.
- 2Choose crop mode. Trim margins from each edge (top, right, bottom, left in points), or apply a custom crop box (x, y, width, height).
- 3Select pages. Apply the crop to all pages, or specify a page range (e.g. 1,3,5-7).
- 4Click Run Crop PDF. The tool sets the CropBox on each selected page using pdf-lib in a Web Worker.
- 5Download the result. The cropped PDF is offered as a download. The original content is preserved — only the visible region changes.
Features
What this tool does
- Trim margins from page edges (in points)
- Custom crop box with precise x, y, width, height
- Apply to all pages or a specific page range
- Non-destructive — original content is preserved
- No upload — runs entirely in your browser
Limitations
Things to know
- Cropping sets the CropBox only; it does not remove or re-encode page content
- Margins must be non-negative and not exceed page dimensions
- Custom crop box must fit within the page MediaBox
- Some PDF viewers may not display the CropBox correctly
FAQ
Frequently asked questions
Is cropping destructive?
No. The tool sets the CropBox, which defines the visible region. The MediaBox and all page content are preserved. You can reset the CropBox in any PDF editor to restore the original view.
What units are used for margins?
Margins and crop box coordinates are in PDF points, where 72 points = 1 inch. The default margin is 36 points (0.5 inch).
What is the difference between margin mode and custom box mode?
Margin mode trims the specified amount from each edge of the page — useful for removing headers, footers, or white borders. Custom box mode applies an absolute crop rectangle with precise coordinates — useful for cropping to a specific region.
Can I crop only specific pages?
Yes. Uncheck "Apply to all pages" and enter a page range like 1,3,5-7. Only those pages will be cropped; others remain unchanged.
Why does my PDF viewer still show the full page?
Most modern viewers honor the CropBox, but some older or non-standard viewers may not. The crop is correctly written to the PDF — try opening the file in a different viewer.