Is there a tool for removing metadata?

the title says it all. is there a tool?

I installed ExifTool, but can't find a way to remove all at once with one command.

exiftool -all= inputfile

The latest version of exiftool supports most file formats.

Output:

1. If the input file contained metadata, it removes the metadata and overwrites inputfile, but saves a copy of the original as inputfile_original in the same folder.
2. If the input file did not contain metadata, it performs no changes.

There are options in ExifTool to delete the original file: -overwrite_original and -overwrite_original_in_place.

The Metadata anonymisation toolkit would do the trick for you. It has a GUI as well.

After Enabling the Universe Repository you can install it with:

sudo apt-get install mat