uproot

uproot is a modern software framework for developing and conducting browser-based behavioral experiments. This includes studies with hundreds of participants such as large-scale surveys and experiments with real-time interaction between the participants.

uproot is 100% Free/Libre Open Source Software, and contains only unencumbered code. All libraries, styles and fonts are included and served locally (no CDNs). uproot believes in best practices.

Getting started

uproot recommends the use of uv, a fast Python package manager that handles Python installation and the installation of dependencies automatically. See alternative installation with pip if you prefer traditional tools.

1. Install uv

macOS/Linux:

curl -LsSf https://astral.sh/uv/install.sh | sh

Windows (PowerShell):

powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

See uv installation docs for more options.

2. Create a project

uv run --with uproot-science uproot setup my_project

3. Run uproot

cd my_project
uv run uproot run

You may then log in to the admin area, or run an example experiment. You can find other examples here.

License

uproot is licensed under the GNU LGPLv3, or, at your option, any later version. Among other things, that means: (1) there is no warranty; (2) changes to uproot’s core are automatically licensed under the LGPL as well, (3) you are free to license your own experiments under whatever license you deem appropriate, or no license at all.

© Max R. P. Grossmann, Holger Gerhardt, et al., 2026. A full alphabetical overview of contributors may be viewed here.

Citation

You are ethically obliged to cite specialist software used to create research outputs. Please cite the following paper:

 @unpublished{uproot,
  author = {Grossmann, Max~R.~P. and Gerhardt, Holger},
  title = {uproot: A Software Framework for Behavioral Experiments},
  year = {2026},
  note = {Unpublished manuscript}
}

Contributing

Interested in contributing? See our Contributing Guide for development setup, coding standards, and workflow information.