Programming language: PHP
Tags: Content Management Systems (CMS)    
Latest version: v1.17.0

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Backdrop is a full-featured content management system that allows non-technical users to manage a wide variety of content. It can be used to create all kinds of websites including blogs, image galleries, social networks, intranets, and more.

Backdrop aims to provide:

  • A CMS that can be used out-of-the-box.
  • Code that can be learned quickly.
  • Extensible APIs.


  • PHP 5.3.2 or higher. Even if Backdrop can run on older versions of PHP, we strongly recommend that you use a supported version of PHP.
  • MySQL 5.0.15 or higher with PDO enabled
  • Apache (recommended) or Nginx web server
  • 50 MB of disk space (recommended), 15 MB (minimum)


  1. Create a new database, username, and password for Backdrop to use in MySQL.

  2. Point your browser at the URL of your Backdrop installation. You will be redirected to the install screen. If you're not redirected, visit the install URL. If Backdrop was installed at http://example.com/backdrop, the install URL would be http://example.com/backdrop/core/install.php.

  3. Follow the instructions provided by the installer.

Bug Reports and Feature Requests

Please use the GitHub issue tracker for reporting all bugs and features. We use a separate issue tracker that is not part of the main Backdrop code repository because of GitHub's restrictions on the use of labels and issue management.

Security Issues

If you have discovered a security issue with Backdrop CMS or any of its contributed modules, please contact the Backdrop Security Team directly at security@backdropcms.org. We manage security issues separately in a private repository until the issue has been resolved. Even if you're not sure if it's a security problem, please contact the security team before filing an issue.


Backdrop is a fork of Drupal. It preserves the legacy audience of developers who value ease of use and speed of learning over architectural flexibility. You can join Backdrop's developer community by forking Backdrop on GitHub.

When submitting a pull request, please make sure there is an open issue in the issue tracker and reference it in the description on the pull request.

Thanks to the following companies for providing sponsorship through services and products which may be used by Backdrop contributors to build and improve the project:

User Guide

Please see the the Backdrop Handbook.

Developer Documentation

Please see the the Backdrop API Documentation.


Backdrop is GPL v2 (or higher) software. See the LICENSE.txt file for complete text. Distributions of this software may relicense it as any later version of the GPL.

All Backdrop code is Copyright 2001 - 2016 by the original authors.

Backdrop also includes works under different copyright notices that are distributed according to the terms of the GNU General Public License or a compatible license. These individual works may have specific copyright information noted within their source code files or directories.

*Note that all licence references and agreements mentioned in the Backdrop CMS README section above are relevant to that project's source code only.