Correct file extension

Case: I want to change the file extensions of a batch of files.

A file extension is the part of a filename after the last dot, such as .jpg, .txt, or .mp4. It tells the operating system what type of file it is and which program should open it.

There are several practical reasons to change file extensions, like to correct wrong extensions, such as .txt mistakenly added to an image or to standardize extensions (e.g. .jpeg to .jpg)

Note: Changing a file's extension does not convert its format. For example, renaming a .txt file to .jpg does not turn it into an image. The same goes for converting between image formats like .png to .jpg. The file's content remains unchanged, and it may not open correctly if the extension does not match the actual file type.

This is how you change file extensions in Advanced Renamer:

1. Add the files to the list.
2. If there are methods in the method list, click the Clear Methods toolbar
3. Add the New Name method and configure it like this:
• New name: jpg
• Apply To: Extension
4. Verify the names in the list and click Start Batch.