Poster tiler
Choose a picture and how many pages wide the poster should be. The tool works out the pages needed, adds an overlap strip for gluing and builds a PDF with one tile per page. Nothing is uploaded.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Choose a picture.
- Pick the paper size and orientation, how many pages across, and the overlap.
- Check the page count and the poster size, then press Create PDF.
- Print the PDF at 100% scale, trim the overlap and glue the pages together.
How it works
For pages of width w and an overlap o, the poster is cols × w − (cols − 1) × o wide. The height follows the picture’s aspect ratio, and the rows needed cover it with the same overlap. Each PDF page shows one window of the picture at full size. With the option on, dashed lines mark where the neighbouring page begins, and a small label gives the row and column.
Worked example
A landscape 3:2 photo on A4 portrait pages, 2 across with a 10 mm overlap: the poster is 2 × 210 − 10 = 410 mm wide and 410 × 2 ÷ 3 ≈ 273 mm high. One row of pages is 297 mm tall, so the poster needs 2 pages (2 across × 1 down).
Tips
- Use landscape pages for wide pictures to reduce the number of rows.
- Print one test page first to check colours and scaling.
- Use a straight edge and a glue stick or tape on the back of the page.
Frequently asked questions
How is the number of pages worked out?
You choose how many pages wide the poster is. The width follows from that, the height follows the picture's proportions, and the tool adds as many rows of pages as needed to cover it.
What is the overlap for?
Printers cannot print to the paper edge. A strip that repeats on neighbouring pages lets you trim the margin of one page and glue it over the next without losing part of the picture.
How do I print the PDF at the right size?
Print at 100% or actual size, not fit to page, so the overlap stays correct. Page numbers like 2-3 mean row 2, column 3.
Will the quality be good enough?
It depends on the picture's pixel count. Divide the pixel width by the poster width in inches: around 100 or more is fine for a poster seen from a distance, and 150 or more looks sharp.
Is my image uploaded?
No. The PDF is built in your browser, so the picture never leaves your device.