Home : File Types : KV File

.KV File Extension

File TypeKivy Language File

DeveloperKivy Organization
4.3 (8 Votes)
CategoryDeveloper Files

What is a KV file?

A KV file is a Kivy language file created by Kivy, an open-source Python library used to develop multi-touch enabled, cross-platform applications. It stores source code in the Kivy syntax, which may include rule definitions, a root widget, dynamic class definitions, and templates.

More Information

Kivy is a framework that assists developers in creating cross-platform apps with Python code. It is specifically focused on describing the user interface and interactions in an app.

The Kivy language features several constructs:

  • Root widget - Widgets are the building blocks of GUIs in Kivy and a KV file can contain only one root widget.
  • Rules - A Kivy rule applies to a specific widget and is used in a KV file to modify the widget, such as specifying interactive behavior or adding a graphical representation of a widget.
  • Dynamic classes - A Kivy dynamic class allows you to quickly create new widgets or rules without any Python declaration.
  • Templates - Before being deprecated, Kivy templates were used to save the user time when styling content, like only having to specify the value of a button once for buttons that are used repeatedly. Templates were replaced by dynamic classes in version 1.7.0 of Kivy.

Below is a simple example of a KV file containing a root widget. A KV file should always start with the Kivy header, with the correct Kivy language version used, and then followed by the content:

#:kivy 1.11.1

      text: 'Hi there'

How do I open a KV file?

You can open KV files with Kivy, which is free and available for Windows, macOS, Linux, Android, and iOS. You can edit KV files with JetBrains PyCharm (multiplatform), a Python IDE and Microsoft Visual Studio Code (multiplatform), a source code editor.

Since KV files are saved in plain text, you can also open and edit KV files with a plain text editor, such as Microsoft Notepad (bundled with Windows) or Apple TextEdit (bundled with macOS). However, these text editors do not provide helpful source code editing features.

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Programs that open KV files

Updated 3/24/2021

About KV Files

Our goal is to help you understand what a file with a *.kv suffix is and how to open it.

The Kivy Language file type, file format description, and Mac, Windows, Linux, Android, and iOS programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

If you would like to suggest any additions or updates to this page, please let us know.