Poster Maker: Print a Large Poster on A4 Pages
Split a photo across as many sheets as you like, print them at home and glue them together into a wall-sized poster, with cut marks, page labels and an assembly map.
How to use Poster Maker (Rasterbator)
- 1
Add your photo
Drop or paste any image. A larger photo gives a sharper poster; the effective DPI is shown live.
- 2
Choose the size
Pick the paper, orientation and how many pages across (or the final width in cm or inches), plus margin and gluing overlap.
- 3
Print and assemble
Download the PDF, print at 100%, trim on the cut marks and glue the pages in order using the assembly map.
Make a giant poster with your home printer
You don't need a print shop to make a big poster. This tool, similar to the classic Rasterbator, slices your photo into tiles that fit on standard paper. Print them on any home or office printer, trim and glue them together, and you have a poster of 1, 2 or even 4 metres wide.
Features
- Paper sizes: A4, A3, US Letter and Legal, portrait, landscape or automatic best fit.
- Size by pages or by width: choose how many pages across, or type the final poster width in centimetres or inches. The number of rows follows from the photo's shape.
- Printer margin and overlap: set the unprintable margin of your printer and an overlap strip that makes gluing easy and hides small misalignments.
- Cut marks, labels and assembly map: every page gets crop marks, a label such as A1 or B3, a tiny position map, and an optional first page shows the whole layout.
- Halftone dots style: the famous "rasterbated" look, with big dots that stay sharp at any size, in one colour or the photo's own colours.
- PDF or PNG: download a multi-page, print-ready PDF or a ZIP of PNG pages.
How sharp will it be?
The tool shows the effective print resolution. Around 150 DPI looks sharp up close; 70–100 DPI is fine for a poster you look at from a few steps away. If your photo is small, use fewer pages or switch to the halftone style, which looks deliberate and graphic at any size.
Printing tips
- Always print at 100% / Actual size, not "Fit to page", so the tiles line up.
- Use the overlap strip: cut away the white margin on one edge only and glue it over the dashed strip of the neighbouring page.
- Assemble row by row, starting at A1 in the top-left corner.
- Matte paper reduces glare on large wall posters.
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