Bulk Rename Utility: file renaming software for Windows. Bulk Rename Utility is free of charge for personal, private use, at home. To use Bulk Rename Utility within a business entity, company or for commercial purposes, a commercial license is required. Bulk Rename Utility allows you to easily rename files and entire folders based upon extremely flexible criteria. Add date/time stamps, replace numbers, insert text, convert case, add auto-numbers, process folders and sub-folders....plus a whole lot more!