Crop PDF

Crop changes the CropBox — the visible rectangle a PDF viewer shows you — without deleting anything. The original page content outside the new boundary is still there; it’s just hidden. That matters for scanned documents where you want to remove blank borders without destroying any pixels.

Three crop modes

1. All Pages — drag handles on a single canvas set top, bottom, left, and right margins; the same box is applied to every page. Arrow keys nudge the selection one point at a time.
2. Per Page — a thumbnail strip lists each page individually so boundaries can differ page by page. Useful when page 1 is a portrait cover and the rest are landscape.
3. Auto — the server scans for the tightest bounding rectangle around text, images, and vector graphics, then trims to that without manual input. If a page has decorative borders near the edges, Auto may eat into them; use the padding slider to add breathing room.

When Auto doesn’t give clean results

Auto works well on documents with clear content-to-margin separation. It struggles on pages that use full-bleed images, watermarks that run to the edge, or PDFs where the nominal page boundary is already tight. For those, switch to All Pages mode and drag the handles manually — 20 to 30 minutes faster than per-page adjustments if the whole document needs the same treatment.

Safety padding

A 0–30 point slider available in Auto mode adds whitespace outside the detected content boundary before the crop applies. Zero trims flush to the content edge. Anything above 5 usually prevents accidental clipping on documents with text that runs close to the margin.