ChatGPT Lite

English | 简体中文

ChatGPT Lite is a feature-rich, self-hostable ChatGPT app. Built with Next.js. Ready to deploy and use.

Demo

Try the ChatGPT Lite Demo Site.

Light Theme	Dark Theme

Features

Features:

• Real-time Streaming Responses - Instant token-by-token output via Server-Sent Events
• Rich Markdown Rendering - Full markdown support with syntax highlighting
• Persona System - Create and switch between custom AI personalities with different system prompts
• Multi-conversation Management - Organize and switch between multiple chat threads
• Persistent Chat History - All conversations saved locally with no server-side database required
• File Attachments - Upload images, PDFs, spreadsheets (XLSX/CSV), and text files directly in chat
• Voice Input - Dictate messages using Web Speech API
• Web Search Integration - Models can search the web when needed, with source citations
• Supports OpenAI, Azure OpenAI, and OpenAI-compatible providers
• 40+ UI Themes
• Responsive Design - Desktop and mobile friendly with collapsible sidebar

This project is built on top of ChatGPT Minimal, extending it with themes, personas, file attachments, voice input, and more. Want something lighter? Check out ChatGPT Minimal. Small codebase, easy to understand, hack, and extend.

Deployment

For required environment variables, see Environment Variables.

Deploy to Vercel

Deploy instantly by clicking the button below:

Deploy with Docker

For OpenAI account users:

docker run -d -p 3000:3000 \
   -e OPENAI_API_KEY="<YOUR_OPENAI_API_KEY>" \
   blrchen/chatgpt-lite

For Azure OpenAI account users:

docker run -d -p 3000:3000 \
   -e AZURE_OPENAI_RESOURCE_NAME="<YOUR_AZURE_RESOURCE_NAME>" \
   -e AZURE_OPENAI_API_KEY="<YOUR_AZURE_OPENAI_API_KEY>" \
   -e AZURE_OPENAI_DEPLOYMENT="<YOUR_AZURE_OPENAI_DEPLOYMENT_NAME>" \
   blrchen/chatgpt-lite

Development

Run Locally

1. Install Node.js 22+.
2. Clone this repository.
3. Install dependencies using npm install.
4. Copy .env.example to .env.local and update environment variables.
5. Start the application with npm run dev.
6. Open http://localhost:3000 in your browser.

Environment Variables

The following environment variables are required:

For OpenAI account:

Name	Description	Default Value
OPENAI_API_BASE_URL	(Optional) Use this if you plan to use a reverse proxy for api.openai.com.	https://api.openai.com
OPENAI_API_KEY	Secret key obtained from the OpenAI API website.
OPENAI_MODEL	(Optional) GPT model to use	gpt-4o-mini

For Azure OpenAI account:

Name	Description
AZURE_OPENAI_RESOURCE_NAME	Azure resource name (e.g., "my-openai-resource").
AZURE_OPENAI_API_KEY	API Key.
AZURE_OPENAI_DEPLOYMENT	Model deployment name (not the model name).

Acknowledgments

• Theme code from tweakcn

Contribution

PRs of all sizes are welcome.