Rasterizer is a free tiled printing app for creating huge posters out of pictures on your mobile device. The app blows up images and allows them to be printed on multiple sheets to be taped together for making wall art.

1. Choose an image from your mobile device
2. Decide how big you want the poster to be
3. Select style options
4. Save the output as a PDF for printing

If you don’t have the ability to print directly from your mobile device, you can share the file and send it to your PC.

Tiled printing is a method that computer programs use to enable users to print images larger than a standard page, popularized by a program called The Rasterbator. A tiled printing program overlays a grid on the printed image in which each cell (or tile) is the size of a printed page and then prints each tile. A person can then arrange the tiles to reconstruct the full image.