Today I learned about tuns.sh—a service that lets you share your localhost with the internet using nothing but SSH. No CLI installation, no daemon, no firewall configuration.

The One-Command Solution

ssh -R dev:80:localhost:3000 ash.tuns.sh
# Your local server is now live at https://{user}-dev.tuns.sh

That’s it. Your local dev server running on port 3000 is now publicly accessible with automatic HTTPS. ** Note: The HTTP and HTTPS works only if the public port is port 80. (above: dev:80 is the public port). **

Why This is Useful

Skip the deployment dance when you need to:

• Demo a prototype to a client without deploying to staging
• Test webhooks from Stripe, GitHub, or Twilio against your local server
• Debug mobile apps against your local API
• Collaborate in real-time by sharing your dev environment with teammates
• Host services from home without exposing your network

Quick Reference

# Expose a web server on port 8000
ssh -R dev:80:localhost:8000 tuns.sh
# → https://{user}-dev.tuns.sh

# Expose a TCP service (e.g., database)
ssh -R 0:5432:localhost:5432 tuns.sh
# → tuns.sh:{assigned-port}

# SSH proxy jump (access remote machine via tunnel)
ssh -R mybox:22:localhost:22 tuns.sh
# Client connects with: ssh -J tuns.sh {user}-mybox

Key Features

• Multi-region support - Choose the closest server (e.g., ash.tuns.sh, nue.tuns.sh) for lower latency
• Custom domains - Point your own domain via CNAME + TXT records
• Built-in TUI - Monitor active tunnels with ssh pico.sh → select tuns
• Connection alerts - Get notified on connect/disconnect events via RSS

Custom Domains

For your own domain, set up two DNS records:

customdomain.example.com    CNAME   tuns.sh
_sish.customdomain.example.com   TXT   "SHA256:{your-key-fingerprint}"

Get your fingerprint with:

ssh-keygen -lf ~/.ssh/id_rsa | awk '{print $2}'

Then tunnel through your custom domain:

ssh -R customdomain.example.com:80:localhost:8000 tuns.sh

The Bottom Line

No installs. No configuration. No cloud deployment. Just SSH. Works everywhere SSH works—which is basically everywhere.

Note: tuns.sh is a pico+ paid service.