What it does
Langflow is a visual builder for AI apps. You drag blocks onto a canvas and connect them to create a workflow, for example a chatbot that looks things up in your documents or an AI agent that uses tools.
You can test each workflow in a built-in playground and watch it run step by step. Finished workflows can be shared with other software as an API (a doorway that lets programs talk to each other) or as an MCP server, a standard way to give AI assistants new tools.
Programmers can open up any block and change its Python code. There is a desktop app for Windows and macOS, and it can also be installed as a Python package or run with Docker.
Who it's for
People who want to prototype AI apps without much coding, and developers who want a visual way to build and test AI workflows.
Can I use it without coding?
Yes. Langflow Desktop for Windows and macOS includes everything it needs. You will usually still need an account and key for an AI model provider. New to this? Start here.
Can I run it?
- Cost
- FreeNothing to pay or sign up for.
- Runs on
- Windows, Mac, Cloud
- API key
- Not needed
Try it
- Download Langflow Desktop for Windows or Mac from the Langflow website.
- Open it and build a flow by connecting blocks on the canvas.
- Test your flow in the built-in playground.
Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?
Before you install
- Only download from the official GitHub page or the official download page above. Copies with similar names exist for many popular projects.
- License (MIT): Very permissive: free to use, change and share, including for business.
- More on staying safe