How to crop a PDF (trim the margins)
Last updated: June 28, 2026
Some PDFs waste half the page on white space: a scanned receipt swimming in margin, a slide deck with thick borders, a document that prints with awkward gaps. Cropping fixes it. You draw a box around the part you want to keep, the rest is trimmed away, and you get a tighter file in a few seconds — for free, and without handing your document to anyone.
The quickest way: crop in your browser
You don't need Acrobat or a "free trial" that asks for a card. A modern browser is enough. Here's how to do it with robinpdf's Crop PDF tool:
- Open the Crop PDF page.
- Click the box and select your PDF, or drag it in.
- Drag the corners and edges of the box to frame exactly the area you want to keep.
- Press Crop PDF. Your trimmed file downloads automatically.
That's it — a tighter PDF, framed the way you chose, with no watermark stamped across the pages.
Why "in your browser" matters
Most online PDF tools upload your files to their servers, process them there, and send the result back. For a contract, an invoice or a medical form, that means a copy of a private document sits on a stranger's computer. robinpdf works differently: the cropping happens on your own device using your browser, so the file is never transmitted anywhere. It's faster too, because nothing has to be uploaded and downloaded.
Tips for a clean crop
- Frame a little loose. Leave a thin margin of breathing room rather than cutting right up to the text — it reads better in print.
- One box for the whole document. The crop box applies to every page, so it's perfect for scans that all share the same layout.
- Text stays selectable. Cropping only changes the visible page area; the underlying text isn't flattened to an image, so it stays sharp.
Frequently asked questions
Is it really free?
Yes — no sign-up, no watermark, no page limit.
Will the quality drop?
No. Cropping keeps the original pages as-is and simply trims the borders, so text and images stay sharp.
Can I crop on my phone?
Yes. It works in mobile browsers too, since it doesn't rely on any desktop software.