Host address
127.0.0.1:8080 is the address used from the host. Omitting the address commonly publishes on all host interfaces.
Docker Compose visualizer
Docker Port Mapper
Paste a Compose file to see which host address and port lead to each container service.
Your Compose configuration stays in this browser tab.
Compose configuration
Supports common short and long ports syntax.
One
NAME=value pair per line. Values are used only for local interpolation.Published routes
Waiting for Compose YAMLHow Compose port publishing works
Published → target
In 8080:80, host port 8080 forwards to port 80 inside the service container.
Service DNS
Other Compose services normally connect to the service name and container port, such as http://web:80.