guetzli ☆
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Description:
Perceptual JPEG encoder
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @google  |  formulae.brew.sh
Category: Multimedia
Tags: compression jpeg images optimization multimedia
Install: brew install guetzli
About:
Guetzli is a JPEG encoder that optimizes image compression by prioritizing perceptual quality over strict file size reduction. It generates highly compressed JPEG files that maintain visual fidelity, often resulting in smaller files compared to standard encoders. This tool is ideal for web developers looking to improve page load times without sacrificing user experience.
Key Features:
  • Perceptual quality metric (Butteraugli) for visual optimization
  • Significantly smaller file sizes at equivalent visual quality
  • Compatible with standard JPEG decoders
  • Command-line interface for batch processing
Use Cases:
  • Optimizing website images to reduce bandwidth usage
  • Compressing photos for storage or sharing while maintaining quality
Alternatives:
  • mozjpeg – MozJPEG focuses on compatibility and general compression improvements, while Guetzli prioritizes perceptual quality for potentially smaller visual footprint
  • jpegoptim – JPEGoptim performs lossless optimization, whereas Guetzli uses lossy compression to achieve smaller file sizes
Version History
Detected Version Rev Change Commit
Sep 12, 2025 2:34pm 0 VERSION_BUMP b49ff976
Sep 13, 2024 12:51pm 0 VERSION_BUMP 6d498250
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