localhost:6333: what runs on it and how to open it
Port 6333 is the Qdrant REST port. How to open the dashboard and fix errors.
Open this address: http://localhost:6333This opens on your own computer. It only works if the program is running.
localhost:6333 is Qdrant. The API answers at the root and the dashboard is at localhost:6333/dashboard. Port 6334 is used by gRPC clients.
What runs on localhost:6333
- Qdrant vector database
Commands to start and test port 6333
docker run -d -p 6333:6333 -p 6334:6334 qdrant/qdranthttp://localhost:6333/dashboardcurl http://localhost:6333/collectionsFind what is using port 6333
Run these in a terminal on your computer. Nothing is sent to this site.
If localhost:6333 will not open
- The root address shows JSON
- That is the API. The web dashboard is at /dashboard.
- Port 6333 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 6333
| Port | Usually used by |
|---|---|
| localhost:3306 | MySQL, MariaDB |
| localhost:5432 | PostgreSQL |
| localhost:27017 | MongoDB |
| localhost:6379 | Redis |
| localhost:11211 | Memcached |
| localhost:1433 | Microsoft SQL Server |
| localhost:5984 | CouchDB |
Questions about localhost:6333
- What is 6334?
- The gRPC port of Qdrant. 6333 is the REST API and the dashboard.
- Is localhost:6333 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 6333?
- 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 6333?
- 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:6333 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.