Export Layers is a GIMP plug-in that exports layers as separate images in almost any file format supported by GIMP and possibly third-party plug-ins.
From the main menu, go to "File -> Export Layers...". A dialog appears, allowing you to specify the output folder, the file extension and various other settings.
To export layers, press the "Export Layers" button. For the first layer, a dialog corresponding to the file format appears, allowing you to adjust file format settings. Not all file formats have settings, so no dialog may appear. For subsequent layers, the file export procedure uses the values you specified in the dialog for the first file.
If you want to export the layers with the last values used, you can use the "File -> Export Layers to" menu entry. The file format dialog will not be displayed - instead, the last used values will be used.
2.2.2 (December 20, 2014)
* Set PNG as the default file format.
* Renamed settings containing the word "directory" to contain "folder".
* Allowed to install the plug-in system-wide (e.g. to `C:\Program Files\GIMP 2\lib\gimp\2.0\plug-ins` on Windows).
* Pressing Enter while the focus is on the "File extension" text field will now export layers.
For more information, such as installation, full list of features or known issues, read the Readme.txt file in the package or see the GitHub page for the plug-in: