Here is how it works:
You can create an account on the website using these options:
The CFR will not save your passwords and files.
Allow CFR to access your Google Drive, Dropbox, OneDrive or Amazon S3. The CFR will see files’ hashes only, it will not see the content of your files.
Once your cloud drive is added into the application, you will see the files loaded into the application. Select files and apply the renaming rules. CFR will show you the previews of the filenames before actually renaming them.