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Flare is an application development framework for writing software frontends in pure Python.


Flare is an app development framework for Python-based web-apps running on top of Pyodide in the browser.

It has integrations to concepts with ViUR, an MVC-framework for the Google App Engine platform, but can also be used stand-alone.

Fire up the tiny Hello World live demo. More information can be found in the documentation.


Flare is the result of a several years experience in writing web-apps in pure Python. Formerly compiled from Python to JavaScript using PyJS, it now entirely settles up on Pyodide. Additionally, Flare serves as a toolbox for various projects and solutions developed at Mausbrand Informationssysteme GmbH, a software-company from Dortmund, Germany.


Pyodide is the CPython reference implementation that is compiled using emscripten and runs natively inside modern browsers as WebAssembly (WASM). Pyodide itself comes with the full Python scientific-stack.

For better load-time optimization, we started to maintain our own fork of Pyodide called pyodide-nano.

Related projects

  • html5 became an integrated part of Flare, but also exists stand-alone as a HTML5-DOM-object library. It is the core component of Flare and provides an HTML-parser for rapid DOM prototyping.
  • pyodide-html is another HTML object library for Pyodide which can be directly installed from within Pyodide.


docker build . -t flare:1.0.13 docker run -v $(pwd):/workspace -it flare:1.0.13

python3 /tools/


Copyright © 2022 by Mausbrand Informationssysteme GmbH.

Mausbrand and ViUR are registered trademarks of Mausbrand Informationssysteme GmbH.

You may use, modify and distribute this software under the terms and conditions of the MIT license. See the file LICENSE provided within this package for more information.