How to Build a Password Generator Using Python GUI (Tkinter, pyperclip, random)

Creating small, useful applications is a great way for Python beginners to improve their skills. One such project is a password generator using python gui with a graphical interface.

This tool generates strong, random passwords of any length and allows users to copy them with a single click. It is simple, practical, and an excellent way to learn about GUIs, string handling, and Python libraries.

This guide explains how to build a password generator using Tkinter for the GUI, random for generating random characters, and pyperclip for copying passwords directly to the clipboard.

The goal is to create a user-friendly tool where the user enters the desired password length, clicks a button, and instantly gets a secure password.

Tools and Libraries Used

1. Tkinter – A built-in GUI library in Python. It allows the creation of windows, labels, buttons, and input boxes.
2. random – A built-in module that helps in picking random values from strings or lists.
3. pyperclip – A third-party library used to copy text to the system clipboard. This must be installed separately using pip install pyperclip.

How the Password Generator Works

The application opens a small window where the user is prompted to enter the desired length of the password. After entering the number, clicking the “Generate” button creates a new password containing random uppercase letters, lowercase letters, digits, and symbols.

This password is displayed in a text box. A “Copy” button allows the password to be copied directly to the clipboard, making it easy to paste into websites or applications.

Complete Code for Password Generator in Python using Tkinter

from tkinter import *
import pyperclip
import random

app = Tk()
app.geometry("400x400")

generated_password = StringVar()
password_length = IntVar()
password_length.set(0)

def create_password():
    chars = ('abcdefghijklmnopqrstuvwxyz'
             'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
             '1234567890 !@#$%^&*()')
    
    new_password = "".join(random.choice(chars) for _ in range(password_length.get()))
    generated_password.set(new_password)

def copy_password():
    pyperclip.copy(generated_password.get())

Label(app, text="Password Generator", font="calibri 20 bold").pack()
Label(app, text="Enter password length").pack(pady=3)
Entry(app, textvariable=password_length).pack(pady=3)
Button(app, text="Generate", command=create_password).pack(pady=7)
Entry(app, textvariable=generated_password).pack(pady=3)
Button(app, text="Copy", command=copy_password).pack()

app.mainloop()

Code Breakdown in Simple Terms

The application starts by importing the required libraries. The Tk() class is used to create the main window of the app. Its size is set to 400×400 pixels, which is large enough for the elements used.

Two special variables are created using StringVar() and IntVar(). These are linked to input and output fields. password_length stores the number of characters the user wants in the password, and generated_password stores the password generated by the program.

The function create_password() holds the main logic for generating passwords. A long string named chars contains all the allowed characters: lowercase letters, uppercase letters, digits, and common special symbols. Using a for-loop, the function selects characters randomly from this string according to the length the user entered. The generated password is then displayed in the output field.

The function copy_password() simply copies the password to the clipboard using pyperclip.copy().

The pack() method is used to place these widgets inside the window in a vertical layout with some padding for spacing.

Finally, app.mainloop() keeps the application running and waits for user actions like button clicks or input typing.

How to Run the Application

Before running the code, make sure the pyperclip module is installed. This can be done with the command:

<strong>install pyperclip</strong>

After that, save the code in a .py file, for example, password_generator.py. Run the file using Python. A window will appear with a heading, an input box to enter the password length, and buttons to generate and copy the password.

Conclusion

This Random Password Generator in Python using Tkinter is a simple yet powerful tool for creating strong passwords. It provides an easy-to-use GUI and enables users to generate and copy passwords efficiently. By extending its functionality, you can make it even more secure and user-friendly.

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