# Introduction

**mdBook** is a command line tool to create books with Markdown.
It is ideal for creating product or API documentation, tutorials, course materials or anything that requires a clean,
easily navigable and customizable presentation.

* Lightweight [Markdown] syntax helps you focus more on your content
* Integrated [search] support
* Color [syntax highlighting] for code blocks for many different languages
* [Theme] files allow customizing the formatting of the output
* [Preprocessors] can provide extensions for custom syntax and modifying content
* [Backends] can render the output to multiple formats
* Written in [Rust] for speed, safety, and simplicity
* Automated testing of [Rust code samples]

This guide is an example of what mdBook produces.
mdBook is used by the Rust programming language project, and [The Rust Programming Language][trpl] book is another fine example of mdBook in action.

[Markdown]: format/markdown.md
[search]: guide/reading.md#search
[syntax highlighting]: format/theme/syntax-highlighting.md
[theme]: format/theme/index.html
[preprocessors]: format/configuration/preprocessors.md
[backends]: format/configuration/renderers.md
[Rust]: https://www.rust-lang.org/
[trpl]: https://doc.rust-lang.org/book/
[Rust code samples]: cli/test.md

## Contributing

mdBook is free and open source. You can find the source code on
[GitHub](https://github.com/rust-lang/mdBook) and issues and feature requests can be posted on
the [GitHub issue tracker](https://github.com/rust-lang/mdBook/issues). mdBook relies on the community to fix bugs and
add features: if you'd like to contribute, please read
the [CONTRIBUTING](https://github.com/rust-lang/mdBook/blob/master/CONTRIBUTING.md) guide and consider opening
a [pull request](https://github.com/rust-lang/mdBook/pulls).

## License

The mdBook source and documentation are released under
the [Mozilla Public License v2.0](https://www.mozilla.org/MPL/2.0/).