PDF Bleed Adder
Add bleed area to a PDF for print production — enlarge each page by a configurable bleed margin (3/5 mm or 0.125"), optionally extend the background, and add crop + bleed marks. 100% client-side — your PDF never leaves your browser.
About PDF Bleed Adder
Add bleed area to a PDF for print production — enlarge each page by a configurable bleed margin (3/5 mm or 0.125"), optionally extend the background, and add crop + bleed marks. 100% client-side — your PDF never leaves your browser. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.
FAQ
What is PDF bleed and why do I need it?
Bleed is the extra margin added around a printed page so that when the paper is trimmed to the final size, any background color or image extending to the edge doesn't leave a thin white border from cutting misalignment. Printers typically require 3 mm (Europe) or 0.125 inch (≈3.2 mm, US) of bleed on each side.
How does this tool add bleed to a PDF?
Each page is enlarged by the bleed amount on the selected sides (all sides, top/bottom, left/right, or a single side). The original page content is then embedded into the larger page, shifted by the bleed offset. Optionally a background color fills the new bleed area, and crop marks at the trim corners guide the finishing cut.
What extra features does this tool have compared to others?
(1) Bleed-size calculator (mm → points). (2) 7 bleed-side options (all / top-bottom / left-right / top-only / bottom-only / left-only / right-only). (3) New page-size calculator. (4) Content offset calculator. (5) Crop-mark generator (4 trim corners). (6) Bleed-mark generator for verification. (7) Background-color parser (#hex). (8) Page-extension validator. (9) Text + CSV renderers. (10) Copy + Download. (11) History (localStorage, last 20). (12) Shareable URL. (13) Summary stats. (14) Trim-box calculator. (15) Bleed-area percentage calculator. (16) Print-ready verifier (3 mm / 5 mm standards). (17) 3 standard bleed presets (3 mm, 5 mm, 0.125 inch).
Does the tool modify my original content?
No. A new PDF is generated — your original content is embedded into enlarged pages unchanged. Vector text and graphics remain crisp; only the page size grows. Crop marks and bleed marks are drawn as additional vector lines on top.
Is my data sent anywhere?
No. Bleed generation runs 100% locally in your browser using JavaScript and pdf-lib. Your PDF is never uploaded to a server — the tool works offline once the page is loaded.
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