Please see the Install documentation.ĭrag and drop one or more images on the application window to process your PNG files. The Crunch native macOS GUI application can be installed with Homebrew or the dmg installer that can be downloaded from the repository releases. Please see the Install documentation.Įnter paths to your PNG image files as arguments to the crunch executable. The crunch command line executable can be installed with make or manually. Installation and usage documentation links for each of the Crunch applications are available below. Crunch Image(s) service - a macOS right-click menu service for PNG images selected in the Finder.Crunch GUI - a native macOS drag and drop GUI tool.crunch - a *nix command line executable that can be used on macOS, Linux, and Windows POSIX application deployment environments such as Cygwin or the Windows subsystem for Linux.
#Picture png compressor how to
Please see the benchmarks directory of this repository for details about the benchmarking approach and instructions on how to execute benchmarks locally on the reference images distributed in this repository or with your own image files.Ĭrunch PNG image optimization is available through the following applications that are distributed in this repository: This approach leads to a significant file size gain relative to lossless approaches at the expense of a relatively modest decrease in image quality (see example images below).Ĭontinuous benchmark testing is available in our GitHub Actions CI.
It combines selective bit depth, color type, and color palette reduction with zopfli DEFLATE compression algorithm encoding using the pngquant and zopflipng PNG optimization tools. Crunch is a tool for lossy PNG image file optimization.
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