simpleFILEextCHANGER for Mac

From Robert from Berkeley,California:

Drop a folder onto this application. Then type in the Old Extension and the New Extension. Click the "Change Extensions" button, and the selected files in that folder get changed for you. Let me know if you find this useful.

Note: You're not limited to only being allowed to change a file's extension from the . (period) on down. You can rename any segment of the end of the file's name.

Example:

Old Extension "2001.jpg"

New Extension "2002.jpg"

Vacation_pic_1_2001.jpg to Vacation_pic_1_2002.jpg
Vacation_pic_2_2001.jpg to Vacation_pic_2_2002.jpg
Vacation_pic_3_2001.jpg to Vacation_pic_3_2002.jpg