NonCompressibleFiles quickly makes test files for archiving software, but it won't compress anything for you as it's strictly a way to make a file of any size for the purpose of testing your current methods of compression. If you need that, then this quick, free utility is a lifesaver.
NonCompressibleFiles installed in seconds thanks to its very plain, old-school layout. It isn't much to look at, but the program runs like a dream. It gives you a generic file of the size you want with a click. You can make the file impossible to compress or a "maximum compressible file," which means it will shrink down incredibly small if the program has strong compression. To get the file, you just enter how many files you want, what size you want each to be, and where you want them saved. During testing, it took a couple of seconds to create a small 1MB file. Increasing the file size didn't seem to add any noticeable time to the program's operation.
NonCompressibleFiles lets you create fantastic, uniform files on demand. That makes it great for developers or anyone else who needs to test the performance of any zipping program. If that sounds like you, then you need to download this program.