Encrypt Any PDF or File Instantly – Fuzzu Encryptor GUI | Python + Fernet + customtkinter

 Demo :

Click Video 👇👇👇

Features:

• 1 Hero image of the app GUI in dark mode

• Embedded YouTube Short

• Full description of features and how-to

• Download button (optional zip for demo if hosting available)

• Social share buttons

• CTA: Follow FuzzuTech on YouTube, Instagram & Facebook

Code :

from cryptography.fernet import Fernet

import customtkinter as ctk

from tkinter import filedialog, messagebox

import os

# --- Encryption Function ---

def encrypt_file(file_path):

    if file_path.endswith(".enc") or file_path.endswith(".key"):

        raise Exception("Please select a fresh file (not an encrypted or key file).")

    

    key = Fernet.generate_key()

    fernet = Fernet(key)

    with open(file_path, "rb") as original_file:

        original_data = original_file.read()

    

    encrypted_data = fernet.encrypt(original_data)

    encrypted_path = file_path + ".enc"

    with open(encrypted_path, "wb") as encrypted_file:

        encrypted_file.write(encrypted_data)

    key_path = encrypted_path + ".key"

    with open(key_path, "wb") as key_file:

        key_file.write(key)

    return encrypted_path, key_path

# --- Decryption Function ---

def decrypt_file(file_path):

    key_path = file_path + ".key"

    if not os.path.exists(key_path):

        raise FileNotFoundError(f"Key file not found!\nExpected: {key_path}")

    

    with open(key_path, "rb") as key_file:

        key = key_file.read()

    

    fernet = Fernet(key)

    with open(file_path, "rb") as encrypted_file:

        encrypted_data = encrypted_file.read()

    

    try:

        decrypted_data = fernet.decrypt(encrypted_data)

    except Exception as e:

        raise Exception(f"Decryption failed:\n{str(e)}\nEnsure correct file/key combination.")

    # Restore original file name

    if file_path.endswith(".pdf.enc"):

        output_path = file_path.replace(".pdf.enc", "_decrypted.pdf")

    elif file_path.endswith(".enc"):

        output_path = file_path.replace(".enc", "_decrypted")

    else:

        output_path = file_path + "_decrypted"

    with open(output_path, "wb") as output_file:

        output_file.write(decrypted_data)

    return output_path

# --- GUI Setup ---

ctk.set_appearance_mode("dark")

ctk.set_default_color_theme("blue")

app = ctk.CTk()

app.geometry("500x350")

app.title("🔐 Fuzzu Encryptor GUI")

file_path = ctk.StringVar()

# --- GUI Functions ---

def select_file():

    file_path.set(filedialog.askopenfilename())

def handle_encrypt():

    if not file_path.get():

        messagebox.showwarning("Warning", "Please select a file!")

        return

    try:

        enc_path, key_path = encrypt_file(file_path.get())

        messagebox.showinfo("Success", f"Encrypted Successfully!\nSaved As:\n{enc_path}\nKey File:\n{key_path}")

    except Exception as e:

        messagebox.showerror("Error", f"Encryption Failed:\n{str(e)}")

def handle_decrypt():

    if not file_path.get():

        messagebox.showwarning("Warning", "Please select an encrypted (.enc) file!")

        return

    try:

        output_path = decrypt_file(file_path.get())

        messagebox.showinfo("Success", f"Decryption Successful!\nSaved As:\n{output_path}")

    except Exception as e:

        messagebox.showerror("Error", f"Decryption Failed:\n{str(e)}")

# --- GUI Layout ---

ctk.CTkLabel(app, text="Select File to Encrypt/Decrypt:", font=("Arial", 16)).pack(pady=15)

ctk.CTkEntry(app, textvariable=file_path, width=380).pack(pady=5)

ctk.CTkButton(app, text="📁 Browse", command=select_file, fg_color="#3B82F6").pack(pady=5)

ctk.CTkButton(app, text="🔐 Encrypt File", command=handle_encrypt, fg_color="#EF4444").pack(pady=10)

ctk.CTkButton(app, text="🔓 Decrypt File", command=handle_decrypt, fg_color="#10B981").pack(pady=5)

app.mainloop()