Build an Image Watermarking Tool with Python

Level: Beginner

Your task for today is to create a command-line tool that adds a logo watermark to any image, perfect for protecting your photos or branding your content. For this project, the program we will build works on a single image, but it can be easily expanded to process multiple images in one go.

Project Task

Create an image watermarking tool that:

• Uses the Pillow (PIL) library to work with images

• Takes a main image and a logo/watermark image as input

• Positions the watermark in the bottom-right corner of the image

• Adjusts the watermark transparency for a professional look

• Saves the watermarked image with a new filename

• Works from the command line with simple file paths

• Handles PNG logos with transparency support

This project gives you hands-on practice with image processing, file handling, and working with the Pillow library — essential skills for building media manipulation tools.

Expected Output

The program reads two files, a main image.png file:

And a logo.png file:

The user provides the two image filepaths through the command line:

And here is the final result -the main image with the logo in the lower right corner:

While this can be done with other tools, the power of Python allows you to generate thousands of watermarked images in a couple of seconds.

Join the Python & AI Builders Skool Community

Got questions to ask the author about this project? Join our Python & AI Builders community for weekly Python & AI videos and discussions:

https://skool.com/automateit

Skeleton and Solution

Below you will find both a downloadable skeleton.py file to help you code the project with comment guides and the downloadable solution.py file containing the correct solution.

Get the code skeleton here: