Color Bar.

Four solid process-color patches in a reserved sheet margin. Adds space around the page so the strip stays clear of the artwork.

What color bar does

Four solid process-color patches in a reserved sheet margin. Adds space around the page so the strip stays clear of the artwork.

1Open your file. Drop a PDF (or PNG/JPEG) in — Color Bar 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.
Merge — Combine PDFs into one — reorder, pick pages, interleave or insert blanks.
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.