Online BASE64 converter by Motobit

One online tool for BASE64 is Motobit Software's BASE64 encoder/decoder.

To use it to convert StarTools masks back into importable PNG files;

• Paste the BASE64 code into the text box
• Select the 'decode the data from a Base64 string (base64 decoding)' radio button
• Select the 'export to a binary file, filename:' radio button.
• Name the file for example "mask.png"
• Click the convert the source data button.

This should result in a download of the mask as a PNG file which can be imported into the StarTools mask editor, as welll as other applications.