Merge.

Drop several PDFs and build the exact page sequence you need: a range from each file, in any order, with blank pages where you need them.

What merge does

Drop several PDFs and build the exact page sequence you need: a range from each file, in any order, with blank pages where you need them.

1Open your file. Drop a PDF (or PNG/JPEG) in — Merge reads the page size and count and suggests a starting setup.
2Check the auto layout. The sheet, count and marks are picked for you. The live preview shows exactly what will print.
3Adjust what matters. Change only the settings that need it — everything else stays on its suggested value.
4Export the result. Download a print-ready PDF, or send it straight to print — processed locally, nothing uploaded.

Add Bleed — Extend artwork past the trim so cuts never show white. The finished size does not change.
Crop Marks — Trim and registration marks placed from the page boxes. The sheet grows just enough to hold them.
Color Bar — Add a CMYK control strip outside the artwork.
Split — One file into many: every page, every N pages, or spreads cut into single pages.
Rotate — Turn all, odd or even pages by a quarter, half or three-quarter turn.
Resize — Every page to a standard size, or scaled by a percentage — proportions kept unless you say otherwise.