Pixelmator Classic is a raster graphic editor developed for macOS by Pixelmator Team, and built upon a combination of open-source and macOS technologies. Pixelmator features selection, painting, retouching, navigation, and color correction tools; as well as layers-based image editing, GPU-powered image processing, color management, automation, and a transparent head-up display user interface for work with images. Pixelmator Classic uses Core Image and OpenGL technologies that use the Mac's video card for image processing.

Pixelmator Classic was the first commercial image editor to fully support the WebP image format on Mac.

Pixelmator Classic no longer receives updates and is no longer available on the Mac App Store with the company recommending customers to upgrade to Pixelmator Pro.

Pixelmator Classic does not support image stitching for multi-exposure HDR capture, focus stacking, or panoramic photography.