A simple, but rather a universal program to change the file size. It knows how to work with both decimal and hexadecimal with 16 values. It can work with large files (greater than 4GB), allowing you to specify how the final file size and the amount of change. The size can be specified in bytes, kilobytes, megabytes and gigabytes.

Note: The provided README is in Russian, but the software itself uses English and is straightforward: it does exactly what it says on the tin.