This is the portable version of EF Multi File Renamer - a tool that lets you quickly rename files and directories in batch mode. The tool can be easily used by individuals of any experience level.

Since installation is not necessary, you can place Portable EF Multi File Renamer on an external device (like a USB flash drive), plug it into any computer and directly run its executable file. What's more important is the fact that your Windows registry keys will remain intact.

The interface of Portable EF Multi File Renamer is clean and intuitive. Thanks to the Explorer-based layout, you can easily locate and select files and folders for processing.

In the list you can check out the old and new name, size, date of modification, attributes, type and location of each file. So, you can change the case, extension, file time or date, as well as replace, insert or crop text, use the EXIF information on images, import text from a CSV or TXT file, and others.

Additionally, you can export the file list, undo the last renaming operation, sort items according to several factors (e.g. name, extension, new name), customize the toolbar and columns, configure keyboard shortcuts, change the interface language, and more.

The simple-to-use program takes up a small amount of system resources, has a good response time, quickly applies changes and didn't freeze, crash or pop up errors during our testing. On the other hand, the interface could use some improvements and we weren't able to access the help file. But, even so, we strongly recommend Portable EF Multi File Renamer to all users.