[//]: # (title: Custom Language Support Tutorial)

<!-- Copyright 2000-2021 JetBrains s.r.o. and other contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file. -->

In this tutorial we will add support for a [.properties](https://en.wikipedia.org/wiki/.properties) language and its usages within Java code.

 >  IntelliJ Platform support for custom languages is discussed in more depth in the [Custom Language Support](custom_language_support.md) section.
> Corresponding parts are linked under **Reference** on top of each page in this tutorial.
 >
 {type="tip"}


 > The complete and fully working example plugin used in this tutorial is the [`simple_language_plugin`](https://github.com/JetBrains/intellij-sdk-code-samples/tree/main/simple_language_plugin) code sample.
 >
 {type="note"}

This a step-by-step tutorial, and it requires completing each step, in order:

*  [](prerequisites.md)
*  [](language_and_filetype.md)
*  [](grammar_and_parser.md)
*  [](lexer_and_parser_definition.md)
*  [](syntax_highlighter_and_color_settings_page.md)
*  [](psi_helper_and_utilities.md)
*  [](annotator.md)
*  [](line_marker_provider.md)
*  [](completion_contributor.md)
*  [](reference_contributor.md)
*  [](find_usages_provider.md)
*  [](folding_builder.md)
*  [](go_to_symbol_contributor.md)
*  [](structure_view_factory.md)
*  [](formatter.md)
*  [](code_style_settings.md)
*  [](commenter.md)
*  [](quick_fix.md)