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Ralph Slooten 2019-08-24 23:26:24 +12:00
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# Goptimizer - downscales and optimizes images
Goptimizer is a commandline utility written in Golang. It downscales and optimize existing images JPEG, PNG and Gif files.
Goptimizer is a commandline utility written in Golang. It downscales and optimizes JPEG, PNG and Gif files.
Image downscaling is done within Goptimize (`-m <width>x<height>`, see [Usage](#usage-options)), however optimization is done using the following additional tools (if they are installed):
Image downscaling/rotation is done within goptimize (`-m <width>x<height>`, see [Usage](#usage-options)), however optimization is done using the following additional tools (if they are installed):
- jpegoptim
- jpegtran (`libjpeg-turbo-progs`)
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Usage: ./goptimize [options] <images>
Options:
-gifsicle string
gifsicle binary (default "gifsicle")
-jpegoptim string
jpegoptim binary (default "jpegoptim")
-jpegtran string
jpegtran binary (default "jpegtran")
-m string
downscale to a maximum width & height in pixels (<width>x<height>)
-o string
output directory (default overwrites original)
-optipng string
optipng binary (default "optipng")
-p preserve file modification times (default true)
-pngquant string
pngquant binary (default "pngquant")
-q int
quality - JPEG only (default 75)
-u update to latest release
-v show version number
-q, --quality int quality, JPEG only (default 75)
-m, --max string downscale to a maximum width & height in pixels (<width>x<height>)
-o, --out string output directory (default overwrites original)
-p, --preserve preserve file modification times (default true)
-u, --update update to latest release
-v, --version show version number
-h, --help show help
--jpegtran string jpegtran binary (default "jpegtran")
--jpegoptim string jpegoptim binary (default "jpegoptim")
--gifsicle string gifsicle binary (default "gifsicle")
--pngquant string pngquant binary (default "pngquant")
--optipng string optipng binary (default "optipng")
```