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Python Tkinter Online

Write Python GUI programs with tkinter and use them right here in your browser, with nothing to install. Your windows open in the WINDOW tab next to the editor, drawn as they look on Windows: buttons, entries, menus, canvases, message boxes and the ttk widgets all work, and you can click, type and drag as on a desktop. Start from an example like the Calculator or the To-do list, change it, and share it with a link.

How to Run Tkinter Online

  1. Write your app

    Start with import tkinter as tk, make a window with root = tk.Tk(), add widgets such as tk.Label(root, text="Hello").pack() and end with root.mainloop(). Or click Examples above the editor; each example opens in a new tab and starts at once.

  2. Run it

    Click Run or press Ctrl + Enter. Your windows open in the WINDOW tab, where you can click, type, drag them by the title bar and resize them. Closing the last window, root.destroy() or Stop ends the program.

  3. Lay it out

    pack(), grid() and place() work as on a desktop, with padding, sticky, weights and expand. For the modern look use from tkinter import ttk: ttk.Button, ttk.Entry, ttk.Combobox, ttk.Treeview, ttk.Notebook and the rest.

  4. Make it react

    Give buttons a command, link entries to a StringVar, catch keys and clicks with bind("<Key>", func) and run code later with root.after(1000, func). print() output and errors show in the output panel under the window.

  5. Ask and tell

    messagebox.showinfo(), askyesno(), simpledialog.askstring(), colorchooser.askcolor() and the file dialogs open in the window and return the answer.

  6. Share it

    Click Share to get a link to your app. Whoever opens it can run it and change the code.

Tkinter Examples to Start From

Each example is a short, commented tkinter program you can run, read and change. Open them from the Examples menu.

  • Calculator Buttons in a grid
  • To-do list Entry, Listbox, Scrollbar
  • Sign-up form ttk widgets, messagebox
  • Sketch pad Canvas, the mouse, colorchooser
  • Stopwatch after() timers, StringVar
  • Tic-tac-toe Buttons, a simple AI
  • Notepad Menus, Text, file dialogs
  • Contacts table ttk.Treeview, sorting, Notebook

How Tkinter Runs in Your Browser

Python's own tkinter drives Tk, a desktop toolkit that a browser doesn't have. Here your program runs on Pyodide, the standard Python interpreter compiled to WebAssembly, and import tkinter gets a tkinter made for the browser: the same classes, options and methods, with windows drawn on the page the way Tk draws them on Windows 10 and 11. Nothing is installed and nothing runs on our servers: the program runs in a sandboxed frame that can't see the rest of the page.

Things to Know

  • Waiting calls mainloop(), update(), wait_window() and the dialogs let the page draw while they wait. A long loop that never calls one of them freezes the window until it ends.
  • Your files only Programs can use Python's standard library and your other tabs (import helpers loads helpers.py); open() and the file dialogs see the files in your tabs.
  • Not supported Tcl itself (tk.call() and eval() do only a few things) and fonts in Text tags (their colors and underlines work).
  • Games and drawings pygame and turtle programs run here too; our Pygame and Python Turtle pages have examples for them.

Frequently Asked Questions

Can I run tkinter online without installing Python?

Yes. Write import tkinter and run: your window opens next to your code. It works on Windows, macOS, Linux and Chromebooks, with nothing to install. Python runs in your browser tab on Pyodide, a full Python 3 compiled to WebAssembly.

Is it the real tkinter module?

A browser has no Tk, so import tkinter gets a version made for the browser with the same classes, options and methods: Tk, Toplevel, the widgets, pack, grid and place, variables, events and bind(), after(), Canvas items, Menu, ttk, messagebox, simpledialog, filedialog, colorchooser and font. Your program also runs on your computer unchanged.

What do the windows look like?

Like tkinter on Windows 10 and 11: the same fonts, sizes, colors and ttk theme, so a layout you build here looks the same on a Windows desktop. The windows keep that look in the light and dark themes of this site.

Can I use message boxes and dialogs?

Yes. messagebox, simpledialog.askstring() and the others open a dialog in the window and return the answer, as on a desktop. File dialogs open and save files in the program's folder, where your other tabs are.

What is not supported?

Tcl itself (tk.call() and eval() do only a few things), embedding other programs' windows, and system tray icons. In a Text widget, tags change colors and underlining but not fonts. PhotoImage reads PNG and GIF files and data.

Is it free?

Yes, with no account needed. Click Share to get a link to your app that anyone can open, run and change.