Tools

Trim & Marks

Reduce a PDF to its trim box or to the edges of its art, or add crop marks. Reduce to trim collapses MediaBox + CropBox to an explicit TrimBox. Reduce to art measures the painted area of each page and shrinks every box to it, so the surrounding whitespace goes and the art keeps its exact size and position.

Scope: a geometry tool for digital and short-run print — it rewrites PDF page boxes (TrimBox / CropBox / MediaBox) and draws simple crop marks. It is not a prepress preflight: it doesn't create or validate PDF/X-4, convert color, or manage ICC profiles, and its marks are plain keylines, not registration-ink marks with overprint. For offset or commercial print with strict prepress requirements, use a dedicated prepress tool.
Action
Mark color

Auto reads /OutputIntents then sniffs the content streams. Falls back to RGB if undetectable.

Margin kept on every side of the painted area. 0 trims tight to the ink. Padding never grows the page past the area the file already displays. Each page is rendered in your browser to find its art; a page-sized background object counts as art and is reported as nothing to trim.