Show HN: tunn – Share localhost like a Google Doc (opens in new tab)

Most localhost tunnels expose your dev server to the internet and hope nobody guesses the URL. Tunn lets you specify exactly who gets access.

tunn 8080 --allow=alice@gmail.com

Alice gets a link, logs in with GitHub or a magic link, and sees your localhost. Everyone else gets access denied.

- Works through corporate firewalls (it's just HTTPS)

- Free tier: 100MB/month, 3 tunnels

- Fully open source, self-hostable

Install: curl -fsSL https://tunn.to/install.sh | sh

GitHub: https://github.com/ehrlich-b/tunn

tunn.to is the hosted version, but it's fully self-hostable if you'd rather not trust some guy on the internet. This is a side project, not a startup - first thing I've shipped for myself.