File Substring Replacement Utility (FSRU) performs search and replace operations with multiple strings in multiple files. It was maked specifically for PC programmers working on large projects with a lot of source code files, however any type of file can be used, including HTML. Search and replace operations can as well be performed on filenames (mass renaming). A detailed log is kept of every substring that is found and replaced. Case-insensitive, whole-word, wildcards, and command line searches are supported. FSRU is a professional, rock solid program - dont trust your files to anything less!