Using scripts to rename multiple files automates the process of changing filenames based on defined rules, replacing the time-consuming manual renaming typically done through a file explorer's GUI. This involves writing simple code (a script) executed in a command-line interface (like Terminal or PowerShell) that identifies files matching certain criteria and applies new naming patterns. It fundamentally differs from manual renaming by processing many files simultaneously ("batch processing"), often using patterns, search-and-replace logic, or sequences.

Practical examples include a photographer adding the shoot date (2024-06-Photo-1.jpg) to hundreds of images using a simple find-and-replace script, or a developer numbering all project documentation files sequentially (Doc_001.pdf, Doc_002.pdf) via a script incrementing numbers. These tasks are common across industries like media, software development, and research, using tools such as PowerShell (Windows), Bash scripts (Linux/macOS), or Python scripts.

The primary advantage is massive time savings and ensuring consistent naming across large sets. However, it requires basic scripting knowledge and carries a risk of errors if rules are incorrect, potentially renaming wrong files. Testing scripts on copies first is crucial. As file management grows in complexity, scripting remains vital for efficiency, while newer graphical tools increasingly incorporate batch renaming features for broader accessibility.