What is boringproxy?
boringproxy is a combination of a reverse proxy and a tunnel manager.

What that means is if you have a self-hosted web service (Nextcloud, Emby, Jellyfin, etherpad, personal website, etc.) running on a private network (such as behind a NAT at home), boringproxy aims to provide the easiest way to securely (i.e. HTTPS and optional password-protection) expose that server to the internet, so you can access it from anywhere.

To see how boringproxy compares to other similar software, see the comparison here.

The main features are:

100% free and open source under the MIT license.
Designed from the ground up with self-hosters in mind.
No more port forwarding, NAT traversal, firewall rules, HTTPS certificate management, etc etc. Let boringproxy handle it all for you.
No config files. Seriously, none. It has nice defaults and the few knobs are easily adjusted with simple CLI parameters.
Lightning fast web GUI for managing tunnels from one central place. It even works great on mobile browsers.
Fully configurable through a REST API.
The client software works on Linux, Windows, Mac, and ARM (i.e. Raspberry Pi and Android).
Ships as single executable which contains both the server and client.
SSH under the hood. You can use a standard SSH client if you prefer.
End-to-end encryption (since version 0.4.0). Choose whether to terminate TLS at the server, client, or your application. All handled seamlessly with Let's Encrypt integration.