Sites and apps similar to Pic2Wallpaper include Rasterbator, which is free and open source. Other options are Free Image Splitter. Between them they cover Windows.
The Rasterbator creates huge, rasterized images from any picture. Upload an image, print the resulting multi-page half-toned pdf file and assemble the pages into extremely cool looking poster up to 20 meters in size.
Finland
EU
Free, private, browser-based tool to split any image or PDF into pieces and download them, upscale low-res images, or tile them across pages to print posters at home.
United States
