Change Extension

How to change extension part of filename

Extension part of filename is a part to represent file type, such as, 'htm' is webpage file, 'doc' is Microsofrt Office Word file. Filename and its extension part are separated by dot'.'. You can change filenames extension part by a new one or add a new extension part to no extension part filenames by the program.

If you want to replace a type of extension part of filename, you should specify the old extension part in the box of 'Old extension part', and specify the new extension part in the box of 'New extension part'.

If you want replace or change all types of extension part of filenames, you should select the box of 'Replace all types of old extension part', then specify the new extension part in the box of 'New extension part'.

How to convert extension part of case

Sometime, you would like to convert extension part of filename case. Just select the case you want to convert to and proceed.