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CustomTkinter VS Tkinter

Compare CustomTkinter VS Tkinter and see what are their differences

CustomTkinter logo CustomTkinter

CustomTkinter is a python desktop UI-library based on Tkinter, which provides modern looking and fully customizable widgets.

Tkinter logo Tkinter

Tkinter is a Python wrapper for Tcl/Tk that offers classes to create various graphical user interfaces.
  • CustomTkinter Landing page
    Landing page //
    2026-07-16
  • Tkinter Landing page
    Landing page //
    2023-08-28

CustomTkinter features and specs

  • Modern UI Appearance
    CustomTkinter provides a modern, flat, and visually appealing look for Tkinter applications, with rounded corners, better color schemes, and improved widget styling compared to standard Tkinter.
  • Easy Transition from Tkinter
    Since it's built on top of Tkinter and uses similar syntax and widget names, developers familiar with Tkinter can easily transition to CustomTkinter without a steep learning curve.
  • Built-in Dark and Light Mode
    CustomTkinter supports automatic and manual switching between dark and light appearance modes, making it easy to create apps that adapt to system themes or user preferences.
  • Customizable Themes
    The library allows for extensive customization through theme files (JSON), enabling developers to create and apply custom color schemes and styles across their entire application.
  • Cross-Platform Compatibility
    CustomTkinter works across Windows, macOS, and Linux, providing a consistent look and feel across different operating systems, which is an improvement over native Tkinter's platform-dependent appearance.

Possible disadvantages of CustomTkinter

  • Limited Widget Set
    Compared to more mature GUI frameworks like PyQt or Kivy, CustomTkinter offers a smaller set of widgets, which may require additional custom development for complex applications.
  • Performance Overhead
    The additional styling and rendering logic on top of Tkinter can introduce slight performance overhead, especially in applications with many widgets or frequent UI updates.
  • Dependency on Tkinter Limitations
    Since it's built on Tkinter, CustomTkinter inherits some of Tkinter's inherent limitations, such as less flexible layout management and fewer built-in animations compared to modern frameworks.
  • Smaller Community and Ecosystem
    As a relatively newer library, CustomTkinter has a smaller community, fewer third-party extensions, and less extensive documentation compared to more established GUI frameworks.
  • Occasional Bugs and Inconsistencies
    Being under active development, users may encounter occasional bugs, inconsistent behavior across platforms, or breaking changes between version updates that require code adjustments.

Tkinter features and specs

  • Built-in Standard Library
    Tkinter comes bundled with Python, so there is no need for additional installations. This makes it highly accessible and quick to set up for projects.
  • Ease of Use
    Tkinter provides a simple syntax and an easy-to-understand system for building GUI applications, making it ideal for beginners who are just starting with programming.
  • Cross-Platform Compatibility
    Tkinter applications can run on multiple operating systems like Windows, macOS, and Linux without modification, which ensures broader audience reach.
  • Strong Community Support
    Being part of Python's standard library means that Tkinter benefits from Python's extensive community support, with plenty of tutorials and resources available online.
  • Object-Oriented Approach
    Tkinter supports an object-oriented programming model, which allows for structuring code in a manageable way, especially for larger applications.

Possible disadvantages of Tkinter

  • Limited Widget Set
    Compared to more modern GUI frameworks, Tkinter has a limited set of widgets and may not support advanced user interface features that newer applications might require.
  • Outdated Look and Feel
    The default Tkinter themes and styles may look outdated by modern standards, which might not be suitable for applications where a contemporary design is important.
  • Performance Limitations
    Tkinter may not perform well with applications requiring high-performance graphics or real-time updates, as it is not optimized for these tasks.
  • Learning Curve for Complex Applications
    While simple to use for basic applications, building more complex UI components can become challenging and might require a deeper understanding of the Tkinter framework.
  • Lack of Advanced Features
    Some advanced features like drag-and-drop, custom widgets, or native look and feel on different platforms might be either missing or require additional work to implement.

Analysis of CustomTkinter

Overall verdict

  • CustomTkinter is a solid choice for Python developers who want to build modern-looking desktop GUIs without leaving the familiar Tkinter ecosystem. It provides a good balance between ease of use and visual polish, making it especially attractive for smaller to medium-sized projects.

Why this product is good

  • Built on top of standard Tkinter, so it's easy to learn if you already know Tkinter
  • Provides modern, flat-styled widgets with rounded corners and better default aesthetics than vanilla Tkinter
  • Supports light and dark mode theming out of the box, including system theme detection
  • Cross-platform support for Windows, macOS, and Linux
  • Actively maintained with regular updates and a growing community
  • Free and open-source with a permissive license
  • Good documentation and examples to help beginners get started quickly
  • Customizable color themes and widget appearance without needing CSS-like styling

Recommended for

  • Python developers who want a quick way to modernize Tkinter-based UIs
  • Hobbyists and students building desktop apps for personal or academic projects
  • Small business or indie developers creating internal tools or utilities
  • Developers who prefer lightweight GUI frameworks over heavier alternatives like PyQt or Kivy
  • Projects that need dark mode support without complex theming systems
  • Anyone already familiar with Tkinter looking for an easy upgrade path

CustomTkinter videos

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Tkinter videos

Which is Better Kivy Or Tkinter? - Python Kivy GUI Tutorial #42

More videos:

  • Review - Python Programming 93 - Review of Tkinter
  • Tutorial - Tkinter Course - Create Graphic User Interfaces in Python Tutorial

Category Popularity

0-100% (relative to CustomTkinter and Tkinter)
Rapid Application Development
Development
13 13%
87% 87
IDE
100 100%
0% 0
Developer Tools
0 0%
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare CustomTkinter and Tkinter

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Tkinter Reviews

25 Python Frameworks to Master
Itโ€™s a great option for creating simple and easy-to-use graphical user interfaces in Python and allows you to add a GUI to your already working scripts pretty easily. PySimpleGUI wraps the power of 4 different GUI libraries, PySide, Tkinter, wxPython, and Remi.
Source: kinsta.com
Which Python GUI library should you use? Comparing the Python GUI libraries available in 2023
Tkinter is a simple library with support for standard layouts and widgets, as well as more complex widgets such as tabbed views & progressbars. Tkinter is a pure GUI library, not a framework. There is no built-in support for GUIs driven from data sources, databases, or for displaying or manipulating multimedia or hardware. However, if you need to make something simple that...
10 Best Python Libraries for GUI
Another top Python library for GUI is Tkinter, which is an open-source Python Graphic User Interface library. It is well known for its simplicity and comes pre-installed in Python, meaning there is no work on your part. These features make it a great choice for beginners and intermediates, but it is not capable of carrying out larger-scale projects.
Source: www.unite.ai
Top 10 Python GUI Frameworks for Developers
Often referred to as the go-to GUI toolkit by a majority of Python developers, Tkinter was created to equip modern developers with a standard interface to the Tk GUI toolkit with its Python bindings. In Tkinterโ€™s world, most of the visual elements that weโ€™re familiar with are called widgets, and each of these widgets offers a different level of customizability.

Social recommendations and mentions

Based on our record, Tkinter seems to be more popular. It has been mentiond 41 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

CustomTkinter mentions (0)

We have not tracked any mentions of CustomTkinter yet. Tracking of CustomTkinter recommendations started around Jul 2026.

Tkinter mentions (41)

  • Migrating from Go to Rust
    Python has sqlite3[0], curses (tui) [1], and tkinter[2] in the stdlib. [0] https://docs.python.org/3/library/sqlite3.html [1] https://docs.python.org/3/library/curses.html [2] https://docs.python.org/3/library/tkinter.html. - Source: Hacker News / about 2 months ago
  • Stdwin: Standard window interface by Guido Van Rossum [pdf]
    The other popular option for cross-platform UI apps was Tcl/Tk: https://en.wikipedia.org/wiki/Tk_(software) ...which even leaked into other language ecosystems like Python: https://docs.python.org/3/library/tkinter.html. - Source: Hacker News / 4 months ago
  • Vibe coding: Time Zone Clock
    ChatGPT understood the hardware and it's limitations, the touchscreen monitor and along with my requirements, we found and used Tkinter which runs on Python. The benefits were it was lightweight, no web stack, runs fast, no browser, no network dependency and customization options. What's really cool is I wanted to have a visual of this idea and requested ChatGPT to generate an image base on my idea and it gave me... - Source: dev.to / 7 months ago
  • Multi Client TCP Chat with Tkinter
    A TCP socket-based chat application allows multiple clients to communicate with a central server in real time. This tutorial walks through building a multi-client chat application using Pythonโ€™s socket and threading modules for backend communication and Tkinter for a graphical user interface (GUI). This is a great project to learn about networking, concurrency, and GUI development. - Source: dev.to / 10 months ago
  • Building a Lightweight OCR-Powered Receipt Parser
    Tkinter Documentation โ€“ Official Python Tkinter library documentation. - Source: dev.to / over 1 year ago
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What are some alternatives?

When comparing CustomTkinter and Tkinter, you can also consider the following products

PyQt - Riverbank | Software | PyQt | What is PyQt?

Kivy - Open source Python framework for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps. Installation on WindowsInstallation on Windows. Installation; What are wheels .

PySimpleGUI - A simple to use GUI that can create custom GUIs

Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.

MD Python Designer - A drag and drop GUI Designer that uses a combination of Tkinter and its own code.

GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.