One simple trick to make your screenshots 80% smaller

In this guide, the author discusses techniques for compressing PNG screenshots on macOS to achieve smaller file sizes without compromising quality, which is particularly useful for sharing images online. The process involves using lossy compression through color quantization with the pngquant tool to reduce the color palette of PNG-32 images to PNG-8, significantly decreasing file sizes while maintaining acceptable image quality, especially for screenshots of simple subjects like buttons and forms. Additionally, lossless compression is enhanced using Google's zopfli library, which provides modest file size reductions. The guide further explains how to automate this compression process using tools like Hazel or Automator by setting up rules to trigger compression whenever a new screenshot is added to a specific directory, such as a dedicated Screenshots folder. The author emphasizes the efficiency of this automated method in achieving up to 80% reduction in file size, making it a valuable approach for frequent users who need to manage and share screenshots effectively.

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