9 Python GUI Libraries That Stand Out in 2025

Traditional Desktop Application Libraries

1. Tkinter – Python's built‑in GUI toolkit

Tkinter is part of the Python standard library, requiring no additional installation. It provides basic widgets such as windows, buttons, and entry fields, making it suitable for quick prototyping of small desktop tools.

import tkinter as tk

def say_hello():
    greeting_label.config(text="Hello, " + name_entry.get())

root = tk.Tk()
root.title("Tkinter Example")
root.geometry("300x150")

name_label = tk.Label(root, text="Enter your name:")
name_entry = tk.Entry(root)

greeting_label = tk.Label(root, text="")
confirm_button = tk.Button(root, text="Say Hello", command=say_hello)

name_label.pack(pady=5)
name_entry.pack(pady=5)
confirm_button.pack(pady=5)

greeting_label.pack(pady=5)
root.mainloop()

2. Kivy – Cross‑platform multi‑touch library

Kivy is an open‑source framework designed for applications that run on multiple platforms, including mobile devices, and supports multi‑touch input via its KV language for separating UI from logic.

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button

class KivyApp(App):
    def build(self):
        layout = BoxLayout(orientation='vertical', padding=20, spacing=10)
        self.name_input = TextInput(hint_text='Enter your name', size_hint=(1, 0.2))
        self.greeting_label = Label(text='Greeting will appear here', size_hint=(1, 0.2))
        confirm_button = Button(text='Say Hello', size_hint=(1, 0.2))
        confirm_button.bind(on_press=self.say_hello)
        layout.add_widget(self.name_input)
        layout.add_widget(confirm_button)
        layout.add_widget(self.greeting_label)
        return layout

    def say_hello(self, instance):
        self.greeting_label.text = "Hello, " + self.name_input.text

if __name__ == '__main__':
    KivyApp().run()

Modern Web‑Style Application Libraries

3. Flet – Flutter‑based UI for Python

Flet brings Flutter's UI engine to Python, allowing developers to build beautiful web, desktop, and mobile apps with hot‑reload and without writing any Dart code.

Pure Python UI, no HTML/CSS/JS required

Supports Web, desktop, and mobile deployment

Real‑time hot updates for smooth debugging

import flet as ft

def main(page: ft.Page):
    page.title = "Flet Example"
    page.vertical_alignment = ft.MainAxisAlignment.CENTER
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER
    name_field = ft.TextField(label="Your name", width=300, text_align=ft.TextAlign.LEFT)
    greeting_text = ft.Text()
    def button_clicked(e):
        greeting_text.value = f"Hello, {name_field.value}!"
        page.update()
    confirm_button = ft.ElevatedButton(text="Say Hello", on_click=button_clicked)
    page.add(name_field, confirm_button, greeting_text)

ft.app(target=main)

4. NiceGUI – Simple Web‑based GUI

NiceGUI builds on FastAPI and Vue.js, letting you create feature‑rich browser‑based interfaces using only Python code. It is well‑suited for dashboards, internal tools, and interactive prototypes.

Write pure Python to generate Vue‑driven UI

Ideal for internal tools and data‑monitoring dashboards

from nicegui import ui

def greet():
    greeting_label.set_text(f"Hello, {name_input.value}!")

name_input = ui.input(label='Enter your name')
confirm_button = ui.button('Say Hello', on_click=greet)

greeting_label = ui.label()
ui.run()

5. Eel – Bridge Python and Web technologies

Eel provides a lightweight way to connect a Python backend with HTML/CSS/JavaScript front‑ends, similar to Electron but far lighter. It is useful when you already have web assets and want to package them as a desktop app.

Leverages existing web stack

Two‑way communication between Python and JavaScript

Lightweight and easy to start

import eel

eel.init('web')

@eel.expose
def greet_user(name):
    return f"Hello, {name}!"

eel.start('index.html', size=(400, 300))

Full‑Stack Python Solutions

6. Reflex – Full‑stack Python (formerly Pynecone)

Reflex lets you write the entire web application in Python; it auto‑generates a React front‑end and includes built‑in state management, making it suitable for complex apps that require modern UI quality.

Complete full‑stack development in Python

Built‑in state management

React‑based high‑quality UI

import reflex as rx

class State(rx.State):
    name: str = ""
    counter: int = 0
    def set_name(self, name):
        self.name = name
    def increment_counter(self):
        self.counter += 1

def index():
    return rx.vstack(
        rx.input(placeholder="Enter your name", on_change=State.set_name, width="200px"),
        rx.button("Say Hello", on_click=lambda: State.set_name(State.name), width="200px"),
        rx.text(State.name),
        rx.divider(),
        rx.text(f"Counter: {State.counter}"),
        rx.button("Increment", on_click=State.increment_counter, width="200px"),
        spacing="1em",
        align="center",
        padding_top="10%",
    )

app = rx.App()
app.add_page(index)
app.compile()

7. PyWebView – Lightweight WebView integration

PyWebView uses the system's native WebView component to display web content without bundling a full browser engine, making it a minimal‑overhead solution for embedding existing web applications in native windows.

Ultra‑lightweight, low resource usage

Native window with WebView rendering

Simple JavaScript‑Python bridge

import webview
import threading

def run_window():
    window = webview.create_window('PyWebView Example', 'web/index.html', width=400, height=300)
    webview.start()

if __name__ == '__main__':
    thread = threading.Thread(target=run_window)
    thread.start()

Terminal Text UI Libraries

8. Textual – Modern TUI in the terminal

Textual enables rich text‑based user interfaces inside the terminal, supporting CSS‑like styling, mouse interaction, and asynchronous programming, turning command‑line tools into visually appealing applications.

Create rich UI directly in the terminal

Supports CSS styling and modern color palettes

Full mouse and keyboard support

from textual.app import App, ComposeResult
from textual.widgets import Header, Footer, Static
from textual.containers import Container

class ClockApp(App):
    CSS = """
    Container {
        align: center middle;
        height: 100%;
    }
    #time_display {
        width: auto;
        height: auto;
        background: $panel;
        color: $text;
        padding: 1 2;
        border: tall $background;
    }
    #time_display:focus { border: tall $accent; }
    """
    def compose(self) -> ComposeResult:
        yield Header()
        yield Container(Static("00:00:00", id="time_display"))
        yield Footer()
    def on_ready(self) -> None:
        self.set_interval(1, self.update_time)
    def update_time(self):
        from datetime import datetime
        current_time = datetime.now().strftime("%H:%M:%S")
        self.query_one("#time_display", Static).update(current_time)

if __name__ == "__main__":
    ClockApp().run()

High‑Performance Professional GUI Libraries

9. Dear PyGui – GPU‑accelerated professional GUI

Dear PyGui is a GPU‑accelerated library inspired by game engines, making it suitable for data‑intensive, high‑frequency‑refresh scenarios such as engineering tools, scientific visualizations, and real‑time dashboards.

GPU‑accelerated rendering for excellent performance

Designed for data‑visualization and high‑refresh use cases

Immediate‑mode UI similar to game engines

from dearpygui.core import *
from dearpygui.simple import *

def save_callback(sender, data):
    input_value = get_value("Input Text")
    log_debug(f"Input value saved as: {input_value}")

def button_callback(sender, data):
    input_value = get_value("Input Text")
    add_text("Result Text", f"You entered: {input_value}")

with window("Main Window"):
    add_text("This is a Dear PyGUI example")
    add_input_text("Input Text", label='Type something', default_value='Hello GUI')
    add_button('Show Input', callback=button_callback)
    add_same_line()
    add_button('Save', callback=save_callback)
    add_separator()
    add_text("Result Text", default_value="Your input will appear here")

start_dearpygui()

Choosing the Right Library

Beginners or quick small tools: start with Tkinter .

Mobile or touch‑enabled apps: choose Kivy .

Modern, cross‑platform UI with polished look: Flet offers a Flutter‑like experience.

Browser‑based internal tools or dashboards: NiceGUI or Reflex provide high development efficiency.

Packaging existing web projects as desktop apps: Eel or PyWebView are appropriate.

Enhancing command‑line tools with rich interaction: Textual brings a GUI feel to the terminal.

Data‑intensive or high‑refresh applications: Dear PyGui leverages GPU acceleration.