PyCharm recognizes numerous file types. Each file type is denoted with a special icon. Custom files types are also allowed. Each file type is associated with one or more extensions that match a certain pattern.
The file types and their extensions are configurable in the File Types dialog.
The file recognized types depend on the installed plugins.
The default types include:
| File Type | Icon | Recognized in |
|---|---|---|
| Archive files |
| Professional Edition, Community Edition |
| Buildout config |
| Professional Edition |
| Chameleon template files |  | Professional Edition |
| C# files |  | Professional Edition, Community Edition |
| C/C++ files |  | Professional Edition, Community Edition |
| CSS files |  | Professional Edition |
| CoffeeScript files |  | Professional Edition |
| Cython files |  | Professional Edition |
| Dart files |  | Professional Edition, Community Edition |
| Diagram files |  | Professional Edition |
| Erlang files | | Professional Edition, Community Edition |
| Files marked as plain text |  | Professional Edition, Community Edition |
| Files opened in associated applications |  | Professional Edition, Community Edition |
| Handlebars files |
| Professional Edition |
| HAML files |  | Professional Edition |
| HTML files |  | Professional Edition, Community Edition |
| IDL files |  | Professional Edition, Community Edition |
| Image files |  | Professional Edition, Community Edition |
| JavaFX files | | Professional Edition, Community Edition |
| JavaScript files |  | Professional Edition |
| JavaScript test files |  | Professional Edition |
| JavaScript files that can be executed on Node.Js |
| Professional Edition |
| JSHint configuration files |  | Professional Edition |
| JSON files |  | Professional Edition |
| JSTestDriver Config files |  | Professional Edition |
| Less files |  | Professional Edition |
| Localization files |  | Professional Edition |
| Mako template files |  | Professional Edition |
| Qt UI designer form files |  | Both editions |
| reStructuredText files |  | Both editions |
| Patch files |  | Professional Edition, Community Edition |
| Perl files | | Professional Edition, Community Edition |
| Python scripts |  | Both editions |
| Regular expressions |  | Professional Edition, Community Edition |
| RELAX NG Compact Syntax |  | Professional Edition, Community Edition |
| Sass files |  | Professional Edition |
| SCSS files | | Professional Edition |
| SQL files |
| Professional Edition, Community Edition |
| Stylus files |
| Professional Edition |
| Text files |
| Professional Edition, Community Edition |
| TypeScript files |
| Professional Edition |
| XHTML files |
| Professional Edition, Community Edition |
| XML DTD files |
| Professional Edition, Community Edition |
| XML files |
| Professional Edition, Community Edition |
| YAML files |
| Professional Edition |