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QssStylesheetEditor is a powerful qt stylesheet(QSS) editor. Real-time preview, automatically completion, and user can define custom variables.

Now I want to change a new name for QssStylesheetEditor, welcome everyone to vote:


GUI(v1.5) screeshot


  • Qss code highlight and code folding
  • Automatic completion
  • In-time preview
  • Almost all of the qtwidgets can be previewed
  • Customize variables and reference in Qss
  • Change variable color through color dialog box
  • Reference image by relative path
  • Reference image in resource files
  • Switch different system themes (xp, vista etc.)
  • Internationalization
    • Now Chinese and English translations are available


  • Windows (maybe won't run on xp)
  • macOS
  • Linux
  • UNIX


Follow the steps as below, or install the binary installation package:

  1. download QssStylesheetEditor-1.6-py3-none-any.whl
  2. run pip install QssStylesheetEditor-1.6-py3-none-any.whl install QssStylesheetEditor
  3. run qsseditor or QssStylesheetEditor the app will started

If you are windows 64bit user, binary package and installer is available now.

Alternatively, manually install the package is ok too

  1. install python3: following
  2. install dependencies:
    • preimport: pip install preimport
    • tomlconfig: pip install tomlconfig
    • CodeEditor: pip install CodeEditor
  3. download and unzip package:
  4. Run QssStylesheetEditor:
    • double click qsseditor.pyw
    • or run python qsseditor.pyw

Using custom variable

In QssStylesheetEditor, users can define and use custom variables in QSS.

Using following statement to define new variable:

/*example of custom variable definition*/
$background = #fff;  /* define var with name "background" */
$text = red; /* define var with name "text" */

A variable definition end with a ";".

Reference defined variable as following:

/* example of custom variable reference */
    color: $text; /* reference variable text*/
    background-color: $background; /* reference variable background*/

Users can export the code to qss file without vars by the "File>Export" menu.

Variable Color pick dialog

When a variable is defined in QssStylesheetEditor, the variable will be automatically displayed in the color pannel. You can click the color button to select the variable color through the color pick-up box.

If an undefined variable is referenced, it will be automatically recognized and displayed in the color panel too.

Image reference path

When images are use in the qss code, if the url is relative, QssStylesheetEditor will find the image file in the folder where the qss code file is.

background-image: url("img/close.png");
/* the img folder must be in the same directory of the qss code file*/

image in resource file

If your image files is converted to resource file by pyrcc5(pyrcc5 xxx.qrc -o

You can reference images in the resource file as following:

background-image: url(":/img/close.png");

QssStylesheetEditor will search the resource file must be same of qss file) in the directory of the currently opened qss stylesheet code file and loads it automatically.


QssStylesheetEditor on macOS
Gui on macOS
QssStylesheetEditor GUI V1.2
QssStylesheetEditor GUI V1.0


You can use this software for free in open source projects that are licensed under the GPL. but there is an exception: if you only use it to generate qss file for commercial product, the product's source code can be shipped with whatever license you want.

If you don't want to open your code up to the public, you can purchase a commercial license for USD 10 per developer, and also should purchase a commercial license for PyQt5.

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