Welcome folks today in this blog post we will be bulk compressing multiple png and jpeg images present in the same directory or specific directory in python using pillow library. All the source code of the application is given below.

Get Started

In order to get started you need to install the following library inside your python project using the pip command as shown below

pip install pillow

After installing this library you need to make an app.py file and copy paste the following code

app.py

from PIL import Image
import os


def compress_images(directory=False, quality=30):
    # 1. If there is a directory then change into it, else perform the next operations inside of the 
    # current working directory:
    if directory:
        os.chdir(directory)

    # 2. Extract all of the .png and .jpeg files:
    files = os.listdir()

    # 3. Extract all of the images:
    images = [file for file in files if file.endswith(('jpg', 'png'))]

    # 4. Loop over every image:
    for image in images:
        print(image)

        # 5. Open every image:
        img = Image.open(image)

        # 5. Compress every image and save it with a new name:
        img.save("Compressed_and_resized_with_function_"+image, optimize=True, quality=quality)

compress_images()

So in the above python script as you can see we are importing the pillow library and also the os module which is a built in module in python which is used to get the current working directory and also address of specific directory

And now if you execute this pythonscript by running the below command

python app.py

As you can see in my function call i didn’t provided the directory parameter so the directory parameter is false in this case the python script has taken the current working directory according to the logic of the script so all the images that are present inside the root directory of the project is automatically compressed to smaller or reduced size and you can see in the above screenshot all the output compressed images are created

And now if we provide the directory explicitly in which all the input images are present. Let’s suppose we create a directory called as uploads and then uploads all the images to it as shown below

So now we need to provide the address of the directory at the time of calling the function so we need to modify the python script a little bit as shown below

app.py

from PIL import Image
import os


def compress_images(directory=False, quality=30):
    # 1. If there is a directory then change into it, else perform the next operations inside of the 
    # current working directory:
    if directory:
        os.chdir(directory)

    # 2. Extract all of the .png and .jpeg files:
    files = os.listdir()

    # 3. Extract all of the images:
    images = [file for file in files if file.endswith(('jpg', 'png'))]

    # 4. Loop over every image:
    for image in images:
        print(image)

        # 5. Open every image:
        img = Image.open(image)

        # 5. Compress every image and save it with a new name:
        img.save("Compressed_and_resized_with_function_"+image, optimize=True, quality=quality)

compress_images("uploads")