Try it @ www.lightaffaire.com/tools
Generates a set of random collages of your images for printing, monitor backgrounds, mobile phone backgrounds and banners for various online services.
Supports print sizes 30x20cm upto 180x120cm (3:2 landscape or 2:3 portrait).
Supports monitor screen resolutions HD (1920x1080px) upto 16K (15360x8640px).
Supports mobile screen resolutions for Apple iphone 8/8+/X and Android devices.
Supports banners for various online services ie. facebook / twitter / 500px / flickr etc.
Optionally auto-converts generated collage to black-white.
Optionally sets collage colorspace to CMYK for printing.
Simply upload a zip file containing your images (HD ~30 images upto 16K ~200 images).
Note: Werbung / Verlinkung - required text under German law.