localhost:3210 - LobeChat Application Port Guide


Updated on Mar 7, 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.

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.

Services and Software That Use Port 3210

💬 AI & Chat UI

  • LobeChat: The premier open-source front end for multiple LLM APIs

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.

Access localhost:3210 from Other Devices

Use Pinggy tunnel to share your LobeChat UI out natively:

ssh -p 443 -R0:localhost:3210 free.pinggy.io

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

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: LobeChat stores local data heavily in your browser's IndexedDB by default. Ensure your browser is not wiping data on close.

Summary

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

🚀 Quick Start Commands

# Run LobeChat via Docker
docker run -d -p 3210:3210 lobehub/lobe-chat