Yeah, sure, a public one for not privacy-critical PDFs plus something like a Heroku button to build own secure app (with auth and no storage). See e.g. my file

Yeah, sure, a public one for not privacy-critical PDFs plus something like a Heroku button to build own secure app (with auth and no storage). See e.g. my file sharing app https://github.com/andreif/SecretFile https://github.com/andreif/SecretFile