AnyIP

DNS server for development HTTPS — resolve any IP from a hostname, with free wildcard TLS.

$ dig 127-0-0-1.anyip.dev +short
127.0.0.1

$ dig myapp-192-168-1-5.anyip.dev +short
192.168.1.5

$ curl https://myapp-127-0-0-1.anyip.dev  # ✅ valid TLS

Usage

Use the public anyip.dev service — no setup required.

DNS Resolution

Embed any IP address in the hostname. It just works:

ping myapp-192-168-1-5.anyip.dev      # → 192.168.1.5
curl http://127-0-0-1.anyip.dev:3000  # → connects to localhost:3000

# Nested subdomains work too
dig preview.127-0-0-1.anyip.dev +short  # → 127.0.0.1

HTTPS Certificate

Download the wildcard certificate to enable HTTPS on your local dev server:

# Download cert + key
curl -o fullchain.pem https://anyip.dev/cert/fullchain.pem
curl -o privkey.pem   https://anyip.dev/cert/privkey.pem

# Use with any framework
vite --https --host \
  --ssl-cert fullchain.pem --ssl-key privkey.pem

Subdomain Certificate

For nested subdomains like user1.127-0-0-1.anyip.dev, request a per-IP wildcard cert:

# Request issuance (~10-30s on first call)
curl -X POST https://anyip.dev/cert/sub/127-0-0-1

# Download
curl -o fullchain.pem https://anyip.dev/cert/sub/127-0-0-1/fullchain.pem
curl -o privkey.pem   https://anyip.dev/cert/sub/127-0-0-1/privkey.pem

DNS over HTTPS

Use AnyIP as an encrypted DNS resolver in your browser:

# Browser: Settings → Secure DNS → Custom
https://anyip.dev/dns-query

# Or query directly
curl "https://anyip.dev/dns-query?name=127-0-0-1.anyip.dev&type=A"

Features

Embedded IP Resolution

Any <name>-<ip>.domain hostname resolves to the embedded IP. IPv4 and IPv6 supported.

Nested Subdomains

prefix.ip.domain also resolves — perfect for per-user or per-branch preview domains.

Automatic TLS

Let's Encrypt wildcard certificates via DNS-01, with auto-renewal. Root and per-IP subdomain certs.

Certificate Distribution

Download certs over HTTPS. One curl command to get your dev server running with valid TLS.

DNS over HTTPS

RFC 8484 compliant DoH endpoint. Use as your browser's secure DNS resolver.

Single Binary

Written in Go. Zero dependencies, cross-platform. Deploy anywhere in minutes.

Self-Hosting

Deploy your own instance with Docker:

# 1. Point NS records to your server
#    anyip.dev.  NS  ns1.anyip.dev.
#    ns1.anyip.dev.  A  <your-server-ip>

# 2. Run with Docker
docker run -d --name anyip \
  -e ANYIP_DOMAIN=yourdomain.dev \
  -e ANYIP_ACME_EMAIL=you@example.com \
  -p 53:53/udp -p 53:53/tcp -p 443:443 \
  -v anyip-certs:/certs \
  ghcr.io/taptap/anyip:latest

Or build from source: go build -o anyip ./src

See the full self-hosting guide for details.