Change File Extensions

Whether you want to add sequential numbers, change case, change filename extensions, remove or convert spaces, add folder names or each file's time to its name FileBoss has a quick and easy routine for doing so. And whether you are renaming files just a few at a time or batch rename by the thousands the routines work exactly the same.

How to change filename extensions

1) Select the files to have their extensions changed

In the following example we have the acts of Hamlet that all have the uppercase extension HTML. We will change all of the extensions to simple, lower-case htm for uniformity.

Naturally we could have also just selected a folder and told FileBoss to rename all the files in the folder.

2) Select Actions > Rename... from the main menu

3) Select the Change Filename Extensions tab

The display below shows all the tab. It is important to remember that when the OK button is pressed only the settings in the current tab - in this case the Transform tab - will be used to rename the files.

Click image for full-size view

1. Click on the Change Extensions tab it is not already selected.
2. Select the Change to: radio button and enter htm in the box to the right.

4) Confirm the renamed files

After pressing the OK button in the above step, FileBoss will find the first file to be renamed and display a confirmation dialog similar to the one below with the new filename extension displayed in its own field on the right

You can continue to rename or skip each file individually or at any time you can Rename All the rest of the files or Skip Rest thus ending the renaming.

Note that you can edit the new name anyway you like and then press the Rename button giving you total control over how the file is named.

5) See the results

When FileBoss has finished changing the filename extensions the new names will appear immediately in the Contents window with all their extensions set to lower case htm.