Comment by arkadiyt

Ryan Huber wrote and open-sourced a single file web app called flashpaper for sharing secrets. Here's a version of it I've deployed - it's public to the internet, anyone can create a secret and share it via a one-time-use link:

https://flashpaper.logsnitch.com

Here's Ryan's code:

https://github.com/rawdigits/go-flashpaper