Crop PDF
Trim margins and white space from every page, with the content area detected for you.
Trim The Page Without Touching The Content
Scanned documents and academic papers waste an extraordinary amount of screen space on margins. On a laptop it is mildly annoying; on a phone or an e-reader it makes a page nearly unreadable, because the text is scaled down to fit borders that carry no information.
Cropping here sets the page's crop box — the rectangle every PDF reader treats as the visible area — rather than cutting anything out. The content is untouched, the text stays selectable, and the crop can be undone by anything that resets the box.
Key features
- Detects the content area — the page's own drawing commands are measured to find where the ink actually starts.
- One crop across every page — detection can take the union of all pages so a wide table is never clipped.
- Live proportional preview — the kept area is drawn against the full page, at the real ratio.
- Millimetre sliders — with a padding control, so a detected edge keeps a breath of white space.
- Nothing is re-rendered — no rasterising, no quality loss, no change to the file's text layer.
This tool runs entirely inside your browser using native Web APIs. Your files and text are never uploaded to a server, never logged and never shared with third parties.
How to use: Crop PDF
- Choose the PDF
It is parsed in the page; nothing is uploaded. - Detect or set the margins
Use detection for a starting point, then adjust any of the four sliders. - Check the preview
Step through the pages to be sure nothing important falls outside the kept area. - Download the cropped file
Every page carries the new crop box.
Technical specifications
| Processing location | Entirely in your browser — no server round trip |
|---|---|
| Data uploaded | None. Files and text never leave your device |
| Price | Free — no account, no trial, no usage cap |
| Category | |
| Works offline | Yes, once the page has loaded |
| Browser support | Chrome 90+, Edge 90+, Firefox 90+, Safari 15+ |
| Interface languages | English, 中文, हिन्दी, Español, العربية |
Frequently asked questions
Is the cropped-out content deleted?
No. Setting a crop box changes what a reader displays, not what the file contains, so the content outside it is still present and the crop is reversible. If you need the data genuinely removed — for redaction, for instance — cropping is the wrong tool.
Why can it not detect margins on my scan?
Detection reads the page's drawing commands, which a scanned page does not have: the whole page is one image, and finding the ink inside it would mean rendering the picture and analysing pixels. On a scan, set the margins with the sliders and use the preview.
Will the file get smaller?
Usually not. The content is still there, so the byte count barely changes. What you gain is screen space and printable area, not file size.
Does cropping affect how it prints?
Yes, in a useful way. Most print dialogues fit the crop box to the paper, so a cropped page prints larger — which is exactly the point when reading a two-column paper on paper.
Can I crop different pages differently?
The crop applies to every page in one pass. For different regions on different pages, crop the document once per group and merge the results, or extract the pages first.