Guides › Enlarge an image to poster size

How to Enlarge an Image to Poster Size for Free

You don't need Photoshop or a print shop to blow a picture up. Tile the image across multiple pages at the exact size you want and print it on a regular home printer — for free.

A small image being enlarged and split into a grid of pages to print at poster size — Set the finished size, and the image is split into print-ready pages.

A note on resolution

Enlarging stretches the pixels you have, so the bigger you go, the softer fine detail becomes. Posters are viewed from a distance, so this is rarely a problem — but start with the highest-resolution version of your image you can find for the sharpest result.

Step by step

Upload your image to Maker Mosaic.
Set the finished size. Use the Measure tool to define how wide or tall the final print should be in centimetres or inches.
Pick paper and overlap. Letter, A4, or A3, plus a small overlap margin for alignment.
Check the page count shown live in the print panel, then export a PDF or ZIP.
Print at 100% / actual size and assemble the tiles.

Make it look professional

Use 300 DPI if you'll view the poster up close.
Add a thin border in your image so trimming is forgiving.
Mount the finished print on foam board or laminate it.

FAQ

Will a low-resolution image look bad?

It will be softer up close but usually fine at poster viewing distance. Start with the largest source file you have.

Do I need an account?

No account, no upload — everything runs in your browser.

What's the largest size I can print?

There's no fixed limit; the tool just adds more pages as the size grows.

Open Maker Mosaic →