Looking for software to remove metadata from files
I'm looking for software - freeware preferred, if available - which is capable of stripping out all identifying metadata from various files in order to address privacy or security concerns. Having author information or GPS location included as part of certain images or documents isn't always desirable - and in some countries can be fatal - so I'm trying to find a program which can reliably strip metadata from a wide variety of file types, thus leaving those files without any identifying metadata whatsoever and therefore making them safe to send or post.
I've found software which addresses, say, JPG and PNG files, but doesn't work for other image file types or for documents. Other software will work on various file types, but only removes some of the identifying metadata, not all. I'm trying to find software which will handle a wide range of file types, especially document and image files, and which will remove all identifying or locating information from the metadata.
Any helpful thoughts along these lines will be greatly appreciated.