ImageBlocks makes it easy for you to convert from PNG, BMP, JPG, ICO (Windows only), XPM, TIFF, format files to PNG, BMP, JPG, XPM, or TIFF files.
Use the file browser to select the file you wish to convert.
You can conveniently navigate between folders using Folder history, which stores the last 20 folders.
Select the destination file type in the Convert to control. If you wish, select a different Destination folder by first unchecking Use source folder and then clicking on... to browse for a folder.