Renamer Pro is a powerful bulk file renaming application for Mac that allows you to build customizable renaming workflows with multiple flexible rules: Numbering: Add sequential numbers, configure start, step, padding and custom text. Extension: Change file extensions, set custom values, or keep originals. Creation Date: Insert file creation date/time in various formats into file names. Case Conversion: Transform names to lower, upper, title, snake, kebab, camel, or pascal case; remove spaces. Remove Text: Delete specific words or patterns from file names in one operation. Original Name: Use the original file name (with or without extension) as part of the new name. Regex: Apply advanced regular expressions to find and replace within any part of the file name, globally or by position. Basic Text: Add any custom text anywhere in the new name. Size: Insert the file size, with selectable unit (Byte, KB, MB, GB) and precision. Build, reorder and combine these rules to create powerful name transformations. Preview changes in real time, handle errors and rename whole collections in seconds.