ChatGPT Lite

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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

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 OPENAIAPIKEY="<YOUROPENAIAPI_KEY>" \
   blrchen/chatgpt-lite

For Azure OpenAI account users:

docker run -d -p 3000:3000 \
   -e AZUREOPENAIRESOURCENAME="<YOURAZURERESOURCENAME>" \
   -e AZUREOPENAIAPIKEY="<YOURAZUREOPENAIAPI_KEY>" \
   -e AZUREOPENAIDEPLOYMENT="<YOURAZUREOPENAIDEPLOYMENTNAME>" \
   blrchen/chatgpt-lite

Development

Run Locally

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

Environment Variables

The following environment variables are required:

For OpenAI account:

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

For Azure OpenAI account:

| Name | Description | | -------------------------- | ---------------------------------------------- | | AZUREOPENAIRESOURCE_NAME | Azure resource name (e.g., "my-openai-resource"). | | AZUREOPENAIAPI_KEY | API Key. | | AZUREOPENAIDEPLOYMENT | Model deployment name (not the model name). |

Acknowledgments

• Theme code from tweakcn

Contribution

PRs of all sizes are welcome.