Pillow

What Pillow is

Pillow is a free Python library for opening, editing, and saving image files. It can identify and read more than 30 raster formats, though its write support covers a narrower range focused on common interchange and presentation formats. Its image operations include color transforms, enhancement, geometric transforms, and work with image sequences. Pillow supports current Linux, macOS, and Windows systems; version 12 supports Python 3.10 through 3.14. It is distributed under the open-source MIT-CMU License, and installation is documented through pip. Some capabilities depend on additional libraries: JPEG and zlib are required by default when building from source, while WebP, JPEG 2000, color management, and complex text layout use optional libraries. The project identifies parsing untrusted image data as its primary attack surface and recommends safeguards such as restricting accepted formats, limiting inputs, and using sandboxing. Commercial support and maintenance are also available through a Sonar Subscription.