Check a PDF's margins, safety zone and bleed
Before sending a PDF to a professional printer, check that every page has enough bleed and safety zone to avoid white edges or elements cut off after trimming.
How it works
This check is designed for professional printing (flyers, business cards, packaging), not office printing. The tool reads each page's TrimBox (final size after trimming), BleedBox (bleed area) and CropBox to calculate the thickness of the bleed and safety zone, then compares these values to common print industry standards (at least 3 mm on each side).
What should I do if the tool says "no bleed defined"?
It means the PDF doesn't contain the bleed metadata a professional printer expects — which is the case for nearly all PDFs produced by regular office software (Word, Google Docs). If the document needs to be professionally printed with elements running to the edge of the page, it must be regenerated from page layout software (InDesign, Illustrator, Affinity Publisher…) with the bleed explicitly configured at export.
What's the difference with the "View page boxes" tool?
The box viewer tool shows the raw dimensions of each rectangle without passing judgment. This one goes further: it calculates the margins between those rectangles and compares them to usual print safety thresholds to give a verdict you can act on, page by page.
100% local check: the PDF is read entirely in your browser, and no file is sent to a server.