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File Extension Changer
Free Windows file extension changer for bulk renaming. Change existing file extensions, add extensions to files without one, and preview changes before renaming.
About File Extension Changer
File Extension Changer is a free Windows utility for bulk-changing file extensions without changing the contents of the files. It is useful when many files need the same extension change or when a collection of files is missing an extension.
Choose a folder, enter the new extension, preview the proposed filenames, and then rename the files. The app can also add an extension to files that currently have none. It is designed as a portable Windows EXE, so there is no traditional installer to manage.
FEATURES
What it does
Bulk extension changes
Rename large groups of files in one operation.
Missing extensions
Add an extension to files that do not currently have one.
Preview before rename
Review current and new filenames before committing changes.
Portable EXE
Run the utility directly without a traditional installer.
Frequently asked questions
Does File Extension Changer convert files?
No. It changes the filename extension only. It does not convert, transcode, or modify the file contents.
Can I preview the changes first?
Yes. The app can show the current filename and proposed new filename before the rename operation is performed.