f2

F2 is a command‑line utility that renames files and directories in bulk across Windows, macOS and Linux. It operates from the terminal, allowing users to apply simple string replacements, regular‑expression patterns, or file‑based variables such as EXIF metadata for images and ID3 tags for audio. The tool performs a dry run by default so the proposed changes can be inspected before any modifications are made.

Safety mechanisms verify each operation for conflicts and errors, and any detected naming collisions can be resolved automatically. An undo feature lets users revert a renaming batch, reducing the risk of accidental loss. The implementation in Go provides high performance, handling thousands of items quickly while keeping resource usage low.

F2 targets developers, system administrators, and power users who need reliable, scriptable batch renaming without a graphical interface. Documentation includes examples, tutorials, and guidance on using CSV files, pair renaming, and sorting, and the project welcomes contributions under an MIT licence.