License FAQs

Commonly asked questions about UnderStrap’s open source license.


UnderStrap is released under the terms of the GPL version 2 or (at your option) any later version.

© 2018 UnderStrap. Boiled down to smaller chunks, it can be described with the following conditions.

It requires you to:

  • Keep the license and copyright notice included in UnderStrap’s PHP, CSS and JavaScript files when you use them in your works

It permits you to:

  • Freely download and use UnderStrap, in whole or in part, for personal, private, company internal, or commercial purposes
  • Use UnderStrap in packages or distributions that you create
  • Modify the source code
  • Grant a sublicense to modify and distribute UnderStrap to third parties not included in the license

It forbids you to:

  • Hold the authors and license owners liable for damages as UnderStrap is provided without warranty
  • Hold the creators or copyright holders of UnderStrap liable
  • Redistribute any piece of UnderStrap without proper attribution
  • Use any marks owned by Twitter in any way that might state or imply that Twitter endorses your distribution
  • Use any marks owned by Twitter in any way that might state or imply that you created the Twitter software in question

It does not require you to:

  • Include the source of UnderStrap itself, or of any modifications you may have made to it, in any redistribution you may assemble that includes it
  • Submit changes that you make to UnderStrap back to the UnderStrap project (though such feedback is encouraged)

The full UnderStrap license is located in the project repository for more information.

UnderStrap Documentation

The UnderStrap Documentation Project is released under the same MIT license under which the BootStrap Documentation is released.

See the included MIT license for details.