Inject professional bleed margins and precision corner crop marks into digital PDF documents directly in your browser. Commercial print shops and digital presses require documents to include standard 0.125-inch (9-point) bleed boundaries beyond the trim line alongside hairline corner crop marks so automated guillotine cutters do not leave unprinted white slivers along trimmed edges.

Documents exported from consumer design platforms like Canva or Microsoft Word often omit bleed boxes and trim indicators, resulting in print shop preflight rejection. This utility expands your document canvas by a calibrated 0.5-inch (36-point) safety margin, embeds original artwork at exact 1:1 scale, and draws 0.5-point hairline crop marks precisely 9 points outside the trim boundaries at all four corners.

For example, processing a standard 8.5×11 inch flyer (612×792 points) embeds the page centered inside a 684×864 point canvas, drawing vector crop marks at the 36-point boundary with 9-point bleed offsets ready for commercial print production.

All PDF parsing, page geometry expansion, and line drawing execute locally in your web browser via pdf-lib. Your creative files, commercial artwork, and client documents never leave your local device.