customtkinter
Create modern looking GUIs with Python
Decision gist · record as of 2026-08-14
Yes. CustomTkinter is actively maintained, has no known vulnerabilities, installs with minimal friction, and offers permissive licensing. It's a practical choice for developers who want modern GUI styling without abandoning Tkinter's simplicity or adopting a heavier framework. Install it if you're building desktop applications and want contemporary appearance with familiar Tkinter semantics.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.7 or later; underlying Tkinter must be available on the system.
- Low friction installation; the package is actively maintained with a recent release cycle and depends only on lightweight runtime libraries (darkdetect, typing_extensions, packaging).
License · maintenance · safety
permissive license (permissive) — Licensed under Creative Commons Zero v1.0 Universal with MIT classifier, offering permissive terms suitable for most use cases including commercial projects.
last release 2026-06-24 (51 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,205,840 downloads/mo, #4,223 on PyPI
Alternatives
Verify before relying
pip install customtkinter
import customtkinter
app = customtkinter.CTk()
app.mainloop()- Whether darkdetect integration enables automatic light/dark mode detection on all supported platforms.
- Extent of widget customization options and styling API surface compared to standard Tkinter.
What it is and what it does
CustomTkinter is a wrapper around Python's standard Tkinter library that adds modern visual styling and customization capabilities to desktop GUI applications. It allows developers to build graphical interfaces with a contemporary appearance while retaining Tkinter's simplicity and cross-platform compatibility. The package depends on darkdetect for system appearance detection, typing_extensions for type hints, and packaging for version handling.
Developers use CustomTkinter when they want to create desktop applications with polished, modern-looking interfaces without switching to heavier frameworks. It's particularly useful for projects where Tkinter's native widgets feel dated but a full framework like PyQt or wxPython adds unnecessary complexity. The library maintains active development and has achieved significant adoption in the Python GUI community.
Use it for
- Build desktop applications with modern dark/light theme support and contemporary widget styling.
- Create simple data entry or configuration tools with a polished appearance using familiar Tkinter patterns.
- Develop cross-platform GUI applications that look native on Windows, macOS, and Linux without framework overhead.
- Prototype or iterate on GUI designs quickly while maintaining Tkinter's lightweight footprint and ease of learning.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
CustomTkinter is actively maintained, has no known vulnerabilities, installs with minimal friction, and offers permissive licensing. It's a practical choice for developers who want modern GUI styling without abandoning Tkinter's simplicity or adopting a heavier framework. Install it if you're building desktop applications and want contemporary appearance with familiar Tkinter semantics.
Install
customtkinter on PyPI
Before you install
Low friction installation; the package is actively maintained with a recent release cycle and depends only on lightweight runtime libraries (darkdetect, typing_extensions, packaging).
Requires Python 3.7 or later; underlying Tkinter must be available on the system.
License in practice
Licensed under Creative Commons Zero v1.0 Universal with MIT classifier, offering permissive terms suitable for most use cases including commercial projects.
Quickstart
pip install customtkinter
import customtkinter
app = customtkinter.CTk()
app.mainloop()Verify before relying
- Whether darkdetect integration enables automatic light/dark mode detection on all supported platforms.
- Extent of widget customization options and styling API surface compared to standard Tkinter.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.7 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 3 packagesdarkdetecttyping_extensionspackaging |
| Maintenance | Actively maintained 51 days since the last release |
| First released | |
| Downloads | 1,205,840 / month, #4,223 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3 :: Only |
Evidence: customtkinter-6.0.0-py3-none-any.whl
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