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iqiancheng/png_to_jpg_compress.md

Last active October 21, 2025 09:23
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把当前目录下所有 PNG 转成 75% 质量的 JPG on macOS magick CLI
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png_to_jpg_compress.md 
# 把当前目录下所有 PNG 转成 75% 质量的 JPG，并在原文件名后加 _quality75.jpg
find . -maxdepth 1 -type f -iname '*.png' -print0 | xargs -0 -I{} sh -c 'magick "$1" -background white -alpha remove -alpha off -strip -quality 85 "${1%.png}_q85.jpg"' _ {}

说明 • 使用 -background white -alpha remove -alpha off 处理透明背景，避免黑底；如需其他颜色，把 white 改成你想要的颜色值（如 “#1e1e1e”）。 • -strip 会移除元数据以进一步减小体积；若需保留 ICC/EXIF，删除 -strip。 • 质量 75 是偏中高的网页常用档位；需要更高或更小体积，调节 -quality。

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