FAQ
Does this physically remove the cropped content? Not exactly. We set the PDF's CropBox, which tells viewers what part of each page to display and what to send to printers. The hidden content is still in the file (a viewer with "show full page" mode could see it). For absolute removal, the only way is to render each page to an image and re-create the PDF — which loses text-selectability.
What is a "point"? A PDF point is 1/72 of an inch. Letter paper (US standard) is 612 × 792 points. 36 pt = 0.5 inch margin. 72 pt = 1 inch margin.
Can I crop different pages differently? Currently no — the same margins apply to every page. Variable per-page cropping needs a more complex UI (per-page sliders); we may add it in a future version.