did you ever want to remove any meta data from your jpeg file? such as the software you were editing the image with or the camera type with which you took that photo? or did you even know that some jpgs contain a thumbnail of themselves?

i just found “exiftool”  (http://www.sno.phy.queensu.ca/~phil/exiftool/) which you can use in the windows command line .. with the parameter “-all=” you would remove all meta data …

here the command as an example:

c:\%path_to_your_exiftool_exe%\exiftool.exe -all= c:\%path_to_the_jpegs%\*.jpg

this would remove any meta data … you may want to add the parameter " -ThumbnailImage=" as i don’t know whether these are removed with the “-all="-parameter …

you can see the meta data  by running exiftool without a parameter …

c:\%path_to_your_exiftool_exe%\exiftool.exe c:\%path_to_the_jpegs%\aJpeg.jpg