.paper is a file extension that is only in Dropbox.
You can visit Dropbox here: Dropbox
Here is an example of a .paper file on Dropbox: example of a Dropbox .paper file
add .paper file extension
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1. English language only please
2. No spam, advertisement or inappropriate material
3. No trolling and flaming
Re: add .paper file extension
Thank you, we have added the extension to our database.
https://www.file-extensions.org/paper-file-extension
https://www.file-extensions.org/paper-file-extension