Know Your Ports

localhost:3210LobeChat Application Port Guide

Updated on Oct 24, 2026

localhost:3210

LobeChat Web App Port

Open localhost:3210

Access your LobeChat interface running on port 3210

Localhost:3210 is the default port for LobeChat, an incredibly popular, modern, and open-source high-performance ChatGPT UI. Many developers install LobeChat via Docker or Node, and it boots up immediately on 3210. In January 2026 LobeChat was renamed LobeHub with its 2.0 release; the default port is still 3210.

Because standard HTTP and dev ports like 3000 or 8080 are extremely crowded by React/Next.js/Tomcat apps, LobeChat made the developer-friendly decision to bind to 3210 by default. This makes it instantly recognizable as your AI graphical chat interface while reserving other common ranges for daily dev work.

Access localhost:3210 from Other Devices

Use Pinggy tunnel to share your LobeChat UI out natively:

SSH CLI
Mac / Linux Windows Powershell Windows CMD

This allows other devices globally to seamlessly use your LobeChat web app config.

Services and Software That Use Port 3210

AI & Chat UI

When using LobeChat locally, you visit http://localhost:3210 to configure plugins, custom OpenAI-compliant endpoints (such as Ollama or Jan), and tweak system prompt agents.

How to Troubleshoot Localhost:3210

If you can’t access localhost:3210, here’s how to diagnose and fix common LobeChat development server issues:

Step 1: Check if Docker is Running

Action: Confirm that LobeChat container is up.

How to check: Run docker ps and look for the LobeChat image.

Step 2: Resolve Port Conflicts

Action: Ensure no other program is using port 3210.

How to fix: The port `3210` is rarely used, but verify with lsof -i :3210 if something blocked it.

Step 3: Test the Connection

Action: Verify that the local GUI is accessible.

How to test: Navigate to http://localhost:3210 in Google Chrome or Firefox.

Common Problems and Solutions

Here are typical issues with localhost:3210 and how to resolve them:

"Unable to reach endpoint" Error

Problem: LobeChat UI opens but models fail to respond.

Solution: Navigate to UI settings and ensure your API keys or local LLM base URLs are correctly typed (no trailing slashes).

State / History Mismatch

Problem: LobeChat forgot your conversations after a Docker reboot.

Solution: LobeHub 2.0 removed the browser-only (IndexedDB/PGlite) mode and keeps chats in PostgreSQL. With the official Docker Compose setup the database files live in the data folder next to docker-compose.yml, so keep that folder and start the stack from the same directory.

Summary

  • What it is: localhost:3210 is the default port for LobeChat.

Quick Start Commands

# Run LobeHub with Docker Compose
mkdir lobehub && cd lobehub
bash <(curl -fsSL https://lobe.li/setup.sh) -l en
docker compose up -d