What is Crop PDF?
Crop PDF trims the visible area of PDF pages. You draw a crop box on a large preview of a page, and the same margins are applied to every page you choose, so wide white borders, scanner edges, printer marks or a sidebar you do not need disappear. The tool sets each page’s CropBox, the standard PDF setting that Acrobat, Preview, Chrome and printers use to decide what part of the page to show. Text stays selectable and images are not re-compressed, because nothing is re-rendered.
When to use it
- Remove the wide white margins from an e-book or paper so it reads better on a phone or e-reader.
- Cut the black scanner edges off a scanned document.
- Keep only one half of a two-up page, such as a single receipt on a full A4 scan.
- Trim printer crop marks and slugs from a print-ready proof.
Tips for the best result
- Use a typical page as the preview page; the margins are applied proportionally to pages of other sizes.
- The live readout shows the trimmed margins and new page size in millimetres.
- Tick “Also change the page size” if a print shop or app ignores the CropBox and still shows the full page.
- Run Compress PDF afterwards only if you also need a smaller file; cropping alone barely changes the size.
Limits and privacy
Cropping hides content outside the box but does not delete it; anyone with a PDF editor can restore the full page, so do not rely on cropping to remove confidential information. Password-protected PDFs need to be unlocked first. Processing happens entirely in your browser, so your data never leaves your device and there is nothing to sign up for. Files are processed in your browser and never uploaded.
Related tasks
Many people who use Crop PDF also need Split PDF or Rotate PDF, and Organize PDF is one click away. Every MondayKit tool works the same way – open the page, add your input, get the result – with no account, no watermark and no upload.