The page boxes are resized, so viewers and printers show only the kept area. The underlying page data is not rewritten — most editors treat the result as fully cropped.

This tool applies one crop to all pages, which matches how margin trimming is usually needed. For one page, extract it, crop it, and insert it back.

Percentages scale with each page’s real size, so a document with mixed page sizes still crops evenly.

No — cropping trims edges but does not rotate or deskew pages. Rotate PDF can help with sideways pages.

No — everything runs locally in your browser.