Trim the white space off the edges of a document. Useful for scans with big borders, and for academic papers that waste half a small screen on margins.
Drop it above. The first page appears so you can see what you are trimming.
Move one slider to trim all four edges evenly, or untick the box to set each edge on its own. Step through the pages to check a few before committing.
Leave the pages box empty to crop the whole document, or name the pages you want, like 2, 4-6.
A PDF page carries a crop box, which tells a reader which part of the page to display and print. Cropping here moves that box inward. The content outside it is still in the file, it is simply no longer shown.
That has two consequences worth knowing. The good one is that it is reversible and adds nothing to the file size, so an aggressive crop for reading on a phone costs you nothing and can be undone. The other is that it is not a way to remove sensitive information from the edge of a page, because the content is still there for anyone who looks properly.
For reading on a small screen this is the single most effective change you can make to a paper. A typical journal article gives up a fifth of its height to margins, and reclaiming that is the difference between readable and not on a phone.
No. The work happens inside this tab, on your own machine. Open your browser's network tab while you use the tool, there is no request carrying your file.
Practical limits depend on the tool, browser and available device memory. Large files can fail even when no explicit limit is shown. Keep an original and use a smaller job if this device cannot finish it.
No, and there is no daily limit either. There is nothing to sign up for.
No. It changes which part of each page is shown, and the content stays in the file, so the size is about the same.
Yes. Set the trim you want, name those pages in the box, and save. Run it again with different settings for another set of pages.
No, and please do not. The content is still in the file, it is only hidden from view. To remove something properly, export the pages as images first.
You trim each edge by a percentage of the page, from 0 to 45 percent. By default one slider moves all four edges together, and unticking the box gives each edge its own slider. The Pages to crop box takes numbers and ranges such as 1-3, 7, and leaving it empty crops the whole document.
A preview with previous and next buttons lets you check several pages before you save. Scans are rarely aligned the same on every page, so look at a few, particularly the ones with the most content near the edge.
The page content is not deleted. The visible area is moved inward, so what was outside it is still in the file and the file size is about the same. That makes cropping reversible in principle, and it also means it is not a way to hide something confidential at the edge of a page.
If the page box you type contains no valid page number, the tool shows a warning and disables saving until you correct it. Leave the box empty only when you want to crop every page. A crop that would leave almost nothing of a page is skipped for that page. The saved file keeps the original name with cropped added.