HowToCodePage

Pillow

Image loading, resizing and format conversion.

💡
This course has 3 lessons. Start with the first one and use the next / previous links at the bottom of each lesson — the sidebar keeps the whole course in order.

Lessons

  1. Opening, inspecting and saving imagesWhat Image.open actually does, how to read a file's real properties, and how to save in a format that supports the modes you have.
  2. Resizing, cropping and rotatingThe geometry operations, which resampling filter to pick, and why rotate and thumbnail have surprising defaults.
  3. Drawing and converting formatsAnnotating images with ImageDraw, compositing with alpha, and converting safely between pixel modes in a batch.

More in Python & Data Science

Python 3 NumPy pandas Matplotlib Jupyter Notebook Flask FastAPI Django SciPy Python 2.x R Julia

Last refreshed 2026-09-17.