localhost:9001: what runs on it and how to open it
Port 9001 is commonly the MinIO console. How to open it and fix errors.
Open this address: http://localhost:9001This opens on your own computer. It only works if the program is running.
localhost:9001 is usually the MinIO web console. The S3 API itself runs on 9000. The console port is a choice you make with --console-address.
What runs on localhost:9001
- MinIO console, when started with --console-address ":9001"
Commands to start and test port 9001
docker run -d -p 9000:9000 -p 9001:9001 quay.io/minio/minio server /data --console-address ":9001"curl -I http://localhost:9001Find what is using port 9001
Run these in a terminal on your computer. Nothing is sent to this site.
If localhost:9001 will not open
- The login fails
- The default root user and password are minioadmin unless you set MINIO_ROOT_USER and MINIO_ROOT_PASSWORD. Change them for anything but a quick test.
- The console is on a random port
- Without --console-address, MinIO picks a port for the console. Add the option to fix it to 9001.
- Port 9001 is already in use
- Another program is on this port. Find it with the tool below and stop it, or start yours on another port.
- This site can’t be reached (ERR_CONNECTION_REFUSED)
- The program is not running. Start it and keep that terminal open. See the full checklist.
- Works on your computer, not on your phone
- Start the server on all network addresses and use your computer’s IP address. See how to open localhost from your phone.
Other ports like 9001
| Port | Usually used by |
|---|---|
| localhost:11434 | Ollama (AI models) |
| localhost:5601 | Kibana |
| localhost:11501 | Not a standard port: check what is using it |
| localhost:9200 | Elasticsearch |
| localhost:5672 | RabbitMQ |
| localhost:15672 | RabbitMQ admin page |
| localhost:9090 | Prometheus |
Questions about localhost:9001
- Which port is the S3 API?
- 9000 by default. See the <a href="/localhost/9000">port 9000 page</a>.
- Is localhost:9001 safe?
- Yes, as long as it stays on localhost. Only your own computer can reach it. It becomes reachable from other devices only if you start the program on 0.0.0.0 or your computer's IP address. Do not put development or admin tools on the public internet.
- Can I use a different port instead of 9001?
- Yes. Most programs let you choose the port with a setting or a command option. Pick a free port above 1024 and open that number instead.
- How do I check what is using port 9001?
- Use the port checker on this page. It shows the command for Windows, macOS and Linux and does not send anything to this site.
- Can I open localhost:9001 from my phone?
- Yes, if both are on the same Wi-Fi. Start the program so it listens on all addresses, then open your computer's IP address with the port on the phone. A firewall on the computer can still block it.
Free tools that help
- Common ports listSearch a list of common TCP and UDP port numbers: SSH 22, HTTP 80, HTTPS 443, MySQL 3306, PostgreSQL 5432 and more, with dev server ports.