CloudConvert supports the conversion between more than 100 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats. You can specify advanced options for every conversion type.
"Simple and secure privacy protection
Cloudfogger encrypts your data on the local device before it gets uploaded to the cloud. That guarantees that Dropbox and others never get access to the content of your files."
"They make it simple. We make it secure. Encrypt your files before they sync to Dropbox®, Box®, Google Drive™, OneDrive® or any other folder on your devices."