Since the Antifa will be designated as a terrorist organization[0], I don't suggest you guys to trust github pages, google photos, drive, etc. Tomorrow there may be a subpoena for the IP addresses who use this tool. It may not be enough proof but it'll cost you a lot of money and time. I'd be using local tools like exiftool or gimp.
[0]: https://twitter.com/realDonaldTrump/status/12671296442282475...