Python Image Conversion - How do I convert PNG to JPG and JPG to PNG

Published January 31, 2022

JPG and PNG are two of the most used image formats. In this post, we will convert a JPG image to a PNG and a PNG to a JPG. Simply follow the instructions outlined below:

Step 1: We will first need to create a GUI interface using the Tkinter library in Python. This is the standard Python application interface. We can add Tkinter to our application by importing it using the following command

from tkinter import *

Step 2: Now, Add the following lines to your code to import the required libraries:

from tkinter import *
from tkinter import filedialog as fd
import os
from PIL import Image
from tkinter import messagebox

Step 3: The libraries are successfully added to our application so let's move on to creating the functions to convert JPG to PNG and, secondly, PNG to JPG

Syntax to convert JPG to PNG

img = Image.open("Image.jpg")

img.save("Image.png")

Syntax to convert PNG to JPG

img = Image.open("Image.png")

img.save("Image.jpg")

Step 4: Copy and paste the following code

# import all Libraries

from tkinter import *

from tkinter import filedialog as fd

import os

from PIL import Image

from tkinter import messagebox

root = Tk()

root.title("Image_Conversion_App")

def jpg_to_png():

global im1

import_filename = fd.askopenfilename()

if import_filename.endswith(".jpg"):

im1 = Image.open(import_filename)

export_filename = fd.asksaveasfilename(defaultextension=".png")

im1.save(export_filename)

messagebox.showinfo("Image Conversion success")

else:

Label_2 = Label(root, text="Error!", width=20,

fg="red", font=("bold", 15))

Label_2.place(x=80, y=280)

messagebox.showerror("Conversion failed")

def png_to_jpg():

global im1

import_filename = fd.askopenfilename()

if import_filename.endswith(".png"):

im1 = Image.open(import_filename)

export_filename = fd.asksaveasfilename(defaultextension=".jpg")

im1.save(export_filename)

messagebox.showinfo("Image Conversion success ")

else:

Label_2 = Label(root, text="Error!", width=20,

fg="red", font=("bold", 15))

Label_2.place(x=80, y=280)

messagebox.showerror("Conversion failed")

button1 = Button(root, text="JPG_to_PNG", width=18, height=2,

font=("helvetica", 11), command=jpg_to_png)

button1.place(x=120, y=120)

button2 = Button(root, text="PNG_to_JPEG", width=18, height=2,

font=("helvetica", 11), command=png_to_jpg)

button2.place(x=120, y=220)

root.geometry("500x500+400+200")

root.mainloop()

Step 5: Run your application Now. Everything works fine, and we can convert images with JPG extensions to PNGs and vice versa

Python Image conversion -png to JPG and JPG to PNG

Python Image conversion -png to JPG and JPG to PNG2

Python Image conversion -png to JPG and JPG to PNG 3

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