Skip to content


Repository files navigation

Microsoft Bot Framework Composer

Microsoft Bot Framework Composer

Build Status Coverage Status Total alerts license


Bot Framework Composer is an open-source, visual authoring canvas for developers and multi-disciplinary teams to design and build conversational experiences with Language Understanding and QnA Maker, and a sophisticated composition of bot replies (Language Generation). Within this tool, you'll have everything you need to build a sophisticated conversational experience.

  • A visual editing canvas for conversation flows
  • In context editing for language understanding (NLU)
  • Tools to train, test and manage language understanding (NLU) and QnA components
  • Language generation and templating system
  • A ready-to-use bot runtime executable

The Bot Framework Composer is an open source tool based on the Bot Framework SDK. It is available as a desktop application as well as a web-based component

Bot Framework Composer Home Page

Get Started

Build Composer Locally

To build and run the Composer project locally as a web application, clone the source code from Github and build the application using the instructions below.


git clone
cd BotFramework-Composer
cd Composer # switch to Composer folder
yarn install # install dependencies
yarn build # build extensions and libs
yarn startall # start client and server at the same time

Extend Composer with Extensions

Many aspects of Composer's functionality can be customized and extended through extensions. Features such as authentication, storage, publishing and even the samples and templates available on the homescreen can be customized by creating new extensions.

Read more about building Composer extensions →

Support and Feedback

Related project

The Bot Framework Composer is part of the Bot Framework platform:


This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact with any additional questions or comments.

Issues and feature requests

Please file issues and feature requests here.

Also, see current known issues for high impact bugs you may experience.

Submitting pull requests

If you'd like to contribute pull requests to Composer, see the contributing guide for helpful information on our development workflow.

Reporting security issues

Security issues and bugs should be reported privately, via email, to the Microsoft Security Response Center (MSRC) at You should receive a response within 24 hours. If for some reason you do not, please follow up via email to ensure we received your original message. Further information, including the MSRC PGP key, can be found in the Security TechCenter.