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Our default branch is for development of our Bootstrap 5 release. Head to thev4-dev branch to view the readme, documentation, and source code for Bootstrap 4.

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Several quick start options are available:

• Download the latest release
• Clone the repo:git clone https://github.com/twbs/bootstrap.git
• Install withnpm:npm install bootstrap@v5.3.7
• Install withyarn:yarn add bootstrap@v5.3.7
• Install withBun:bun add bootstrap@v5.3.7
• Install withComposer:composer require twbs/bootstrap:5.3.7
• Install withNuGet: CSS:Install-Package bootstrap Sass:Install-Package bootstrap.sass

Read theGetting started page for information on the framework contents, templates, examples, and more.

Within the download you’ll find the following directories and files, logically grouping common assets and providing both compiled and minified variations.

bootstrap/├── css/│   ├── bootstrap-grid.css│   ├── bootstrap-grid.css.map│   ├── bootstrap-grid.min.css│   ├── bootstrap-grid.min.css.map│   ├── bootstrap-grid.rtl.css│   ├── bootstrap-grid.rtl.css.map│   ├── bootstrap-grid.rtl.min.css│   ├── bootstrap-grid.rtl.min.css.map│   ├── bootstrap-reboot.css│   ├── bootstrap-reboot.css.map│   ├── bootstrap-reboot.min.css│   ├── bootstrap-reboot.min.css.map│   ├── bootstrap-reboot.rtl.css│   ├── bootstrap-reboot.rtl.css.map│   ├── bootstrap-reboot.rtl.min.css│   ├── bootstrap-reboot.rtl.min.css.map│   ├── bootstrap-utilities.css│   ├── bootstrap-utilities.css.map│   ├── bootstrap-utilities.min.css│   ├── bootstrap-utilities.min.css.map│   ├── bootstrap-utilities.rtl.css│   ├── bootstrap-utilities.rtl.css.map│   ├── bootstrap-utilities.rtl.min.css│   ├── bootstrap-utilities.rtl.min.css.map│   ├── bootstrap.css│   ├── bootstrap.css.map│   ├── bootstrap.min.css│   ├── bootstrap.min.css.map│   ├── bootstrap.rtl.css│   ├── bootstrap.rtl.css.map│   ├── bootstrap.rtl.min.css│   └── bootstrap.rtl.min.css.map└── js/    ├── bootstrap.bundle.js    ├── bootstrap.bundle.js.map    ├── bootstrap.bundle.min.js    ├── bootstrap.bundle.min.js.map    ├── bootstrap.esm.js    ├── bootstrap.esm.js.map    ├── bootstrap.esm.min.js    ├── bootstrap.esm.min.js.map    ├── bootstrap.js    ├── bootstrap.js.map    ├── bootstrap.min.js    └── bootstrap.min.js.map

We provide compiled CSS and JS (bootstrap.*), as well as compiled and minified CSS and JS (bootstrap.min.*).Source maps (bootstrap.*.map) are available for use with certain browsers’ developer tools. Bundled JS files (bootstrap.bundle.js and minifiedbootstrap.bundle.min.js) includePopper.

Have a bug or a feature request? Please first read theissue guidelines and search for existing and closed issues. If your problem or idea is not addressed yet,please open a new issue.

Bootstrap’s documentation, included in this repo in the root directory, is built withAstro and publicly hosted on GitHub Pages athttps://getbootstrap.com/. The docs may also be run locally.

Documentation search is powered byAlgolia's DocSearch.

1. Runnpm install to install the Node.js dependencies, including Astro (the site builder).
2. Runnpm run test (or a specific npm script) to rebuild distributed CSS and JavaScript files, as well as our docs assets.
3. From the root/bootstrap directory, runnpm run docs-serve in the command line.
4. Openhttp://localhost:9001 in your browser, and voilà.

Learn more about using Astro by reading itsdocumentation.

You can find all our previous releases docs onhttps://getbootstrap.com/docs/versions/.

Previous releases and their documentation are also available for download.

Please read through ourcontributing guidelines. Included are directions for opening issues, coding standards, and notes on development.

Moreover, if your pull request contains JavaScript patches or features, you must includerelevant unit tests. All HTML and CSS should conform to theCode Guide, maintained byMark Otto.

Editor preferences are available in theeditor config for easy use in common text editors. Read more and download plugins athttps://editorconfig.org/.

Get updates on Bootstrap’s development and chat with the project maintainers and community members.

• Follow@getbootstrap on X.
• Read and subscribe toThe Official Bootstrap Blog.
• Ask questions and exploreour GitHub Discussions.
• Discuss, ask questions, and more onthe community Discord orBootstrap subreddit.
• Chat with fellow Bootstrappers in IRC. On theirc.libera.chat server, in the#bootstrap channel.
• Implementation help may be found at Stack Overflow (taggedbootstrap-5).
• Developers should use the keywordbootstrap on packages which modify or add to the functionality of Bootstrap when distributing throughnpm or similar delivery mechanisms for maximum discoverability.

For transparency into our release cycle and in striving to maintain backward compatibility, Bootstrap is maintained underthe Semantic Versioning guidelines. Sometimes we screw up, but we adhere to those rules whenever possible.

Seethe Releases section of our GitHub project for changelogs for each release version of Bootstrap. Release announcement posts onthe official Bootstrap blog contain summaries of the most noteworthy changes made in each release.

Mark Otto

• https://x.com/mdo
• https://github.com/mdo

Jacob Thornton

• https://x.com/fat
• https://github.com/fat

Thanks toBrowserStack for providing the infrastructure that allows us to test in real browsers!

Thanks toNetlify for providing us with Deploy Previews!

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Code and documentation copyright 2011-2025 theBootstrap Authors. Code released under theMIT License. Docs released underCreative Commons.