PrivateBin

A minimalist pastebin that encrypts text and files in the browser before they reach the server, so the service has no way to read what it stores. The key travels in the fragment of the share link, and a paste can also be locked with a password, given an expiry time or set to burn after a single reading, with optional discussions, syntax highlighting and file uploads.

People use it to hand over credentials, config snippets, log excerpts and error messages without sending them through email or chat history.

Hosting the instance on your own server means internal sharing traffic stays within your network, there is no per-paste billing, and a backup is a simple file copy.