[Feature Request] Anonymise and optimise for public file sharing

[nomandera]

I suspect a common use case will be converting files for later sharing on the internet.

An option(s) that could implement explicit:

• metadata-removal (EXIF, PDF author etc)
• when an image type re-scale to either a target percentage or goal target px maintaining aspect ratio
• anonymising filename (perhaps just SHA hash)

Examples of manual methods of doing above:

• mogrify -resize 20% input.jpg
• mogrify -strip input.jpg

[nomandera]

I know less about optimising as I usually just employ https://tinypng.com/

but these apparently can work

• https://github.com/shssoichiro/oxipng
• https://github.com/lovell/sharp

and I would far prefer not to use a 3rd party.