Decode base64 string to an image(pdf or png) using groovy

Thanks Finan

But I am still not able to switch into desired output i.e. pdf or png image type.

I have my code as code below which saves the encodeed string as base64 extension into D drive. I then needs to extract the file from this base64 manually and view the image output.

Could you please look into the below code and suggest how I can make it to the expected final one.

----------- Code is as below ---------------
teststep=context.testCase.getTestStepAt(context.getCurrentStepIndex()).getLabel()

Image='$'+"{"+teststep+"#Response#//ns1:Label/ns1:Parts/ns1:Image}"
Label=context.expand(Image)

//Specify the location of the label to be saved as below.
def File = new PrintWriter ("D:/"+teststep+".b64")

File.println(Label)
File.flush()
File.close()
-------------------------------

Thanks in advance
Rohit