PyGuetzli is a Python binding for Google’s Guetzli library.

Description of Guetzli from official’s repo:

Guetzli is a JPEG encoder that aims for excellent compression density at high visual quality. Guetzli-generated images are typically 20-30% smaller than images of equivalent quality generated by libjpeg. Guetzli generates only sequential (nonprogressive) JPEGs due to faster decompression speeds they offer.

• Installation
• Guetzli Python Module
• Using with PIL / Pillow images
• Contributing / Reporting a bug

More topics at https://wanadev.github.io/pyguetzli/

import pyguetzli

input_jpeg = open("./test/image.jpg", "rb").read()
optimized_jpeg = pyguetzli.process_jpeg_bytes(input_jpeg)

output = open("./optimized.jpg", "wb")
output.write(optimized_jpeg)

• [NEXT] (changes on master but not released yet):
  • Nothing yet ;)
• v1.0.17:
  • misc(deps): Only pin setuptools version on required platforms (@flozz)
• v1.0.16:
  • misc: Added Python 3.13 support (@flozz)
  • misc!: Removed Python 3.8 support (@flozz)
• v1.0.15:
  • misc: Added Python 3.12 support (@flozz)
  • misc!: Removed Python 3.7 support (@flozz)
• v1.0.14:
  • Guetzli: Apply a better patch to fix the crash caused by a bad access to a vector revealed when compiled with "-D_GLIBCXX_ASSERTIONS" (David Odin)
• v1.0.13:
  • Added Python 3.11 support
• v1.0.12:
  • Guetzli: Fixed a crash caused by a bad access to a vector revealed when compiled with "-D_GLIBCXX_ASSERTIONS" (David Odin)
• v1.0.11:
  • arm64 and universal2 wheels for macOS
  • x86 and x68_64 wheels for musl-based Linux distro (Alpine,...)
  • win32 wheels for Windows (x86_64 were already available)
• v1.0.10: Python 3.10 support and wheels
• v1.0.9: Provides prebuilt wheel packages
• v1.0.8: Updates Guetzli and python dependencies
• v1.0.7: Fixes unicode issue when installing pyguetzli (#4)
• v1.0.6: Fixes a typo in compilator options on unix
• v1.0.5: Adds optimization flags when compiling Guetzli
• v1.0.4: MS Windows support
• v1.0.3: Updates Guetzli library
• v1.0.2: PIL Images: fixes crash with non RGB/RGBA images (grayscale, indexed,…)
• v1.0.1: Adds --std=c++11 flag when building Guetzli
• v1.0.0:
  • New and simpler API
  • Built-in function to deal with PIL / Pillow Images
  • Documentation (Sphinx)
  • Guetzli update
• v0.9.0: Initial release