How to Convert PNG to JPEG Format in Python Pillow?

Pillow - Convert image from PNG to JPEG format

To convert an image from PNG format to JPEG format using Pillow library, first read the given PNG image to a PIL.Image.Image object and then save this image object using Image.save() function with "JPEG" value passed for format parameter.

Syntax of save() function

The syntax of save() function from PIL.Image module to convert from PNG to JPEG format is

PIL.Image.save(filepath, format="JPEG")

where

Parameter	Description
`filepath`	A filename (string), pathlib.Path object or file object. The location to which this image has to be saved.

Returns

The function returns a PIL.Image.Image object.

Examples

1. Convert format of given PNG image to JPEG

In the following example, we read an image test_image.png with PNG format into an Image object. Then, we save this image object with JPEG format using Image.save() function with file name test_image.jpg.

Python Program

from PIL import Image

# Open the image
png_image = Image.open("test_image.png")

# Save the image with JPEG format
png_image.save("test_image.jpg", format="JPEG")

Original Image [test_image.png]

Python Pillow - Convert PNG to JPG - Example input

Resulting Image [test_image.jpg]

Python Pillow - Convert PNG to JPG - Example output

Summary

In this Python Pillow Tutorial, we learned how to convert a given image with PNG format to a JPEG format image using PIL.Image.save() function, with the help of examples.