pillow-jpegxl-plugin

Pillow plugin for JPEG-XL, using Rust for bindings.

Features

• JPEG-XL Plugin for Pillow
• Encoder/Decoder to work with JPEG-XL using safe wrapper
• Support EXIF metadata encoding

Install via PIP

pip install pillow-jxl-plugin

Build from source

Make sure Rust installed, then run:

git clone https://github.com/Isotr0py/pillow-jpegxl-plugin
cd pillow-jpegxl-plugin

pip install -e .[dev] -v

If you have libjxl installed and want to use dynamic link, run:

pip install -e .[dev] -v --config-settings=build-args="--features=dynamic"

Development

• Python code is formatted and linted with ruff, while Rust code is checked with cargo fmt and cargo clippy via pre-commit.
• Install the tooling once with pip install -e .[dev] and then pre-commit install.
• Run the suite manually with pre-commit run --all-files before opening a pull request.

Plugin Usage

Use import pillow_jxl to register the plugin in your code.

Example:

import pillow_jxl
from PIL import Image

# Lossless encode a png image
with Image.open("example.png") as img:
    img.save("example.jxl",lossless=True)

# encode image with JPEG-Style quality
with Image.open("example.png") as img:
    img.save("example.jxl", quality=98)

# Lossless construct from a jpeg image
with Image.open("example.jpg") as img:
    img.save("example.jxl",lossless=True)

# Decode jxl image
with Image.open("example.jxl") as img:
    display(img)

Wheels status

Credits

• inflation/jpegxl-rs