Some of these tasks can also be performed using plugins, which we will go into more below. Usually, this can be done in a tool like Adobe Photoshop or Affinity Photo. One of the most popular ways is to simply compress them before uploading to WordPress. There is more than one way to perform almost all of these optimizations. The primary goal of formatting your images is to find the balance between the lowest file size and an acceptable quality.
How To Optimize Images for Web and Performance Images make up on average 21% of a web page's overall weight.
Or a commercial license for use in non-GPL software (e.g. Under GPL v3 or later with an additional copyright notice that must be kept for the older parts of the code.
See man page ( man pngquant) for the full list of options. Metadata is always removed on Mac (when using Cocoa reader). 16-bit displays or compressed textures in ARGB444 format). Use when the image will be displayed on low-depth screens (e.g. Reduce precision of the palette by number of bits. floyd=0.5Ĭontrols level of dithering (0 = none, 1 = full). Higher speeds are fine with 256 colors, but don't handle lower number of colors well. It's recommended to keep the default, unless you need to generate images in real time (e.g. Speed/quality trade-off from 1 (slowest, highest quality, smallest files) to 11 (fastest, less consistent quality, light comperssion). skip-if-largerĭon't write converted files if the conversion isn't worth it. When this option is used only single input file is allowed. If you use -ext=.png -force options pngquant will overwrite input files in place (use with caution). Set custom extension (suffix) for output filename.
If conversion results in quality below the min quality the image won't be saved (if outputting to stdin, 24-bit original will be output) and pngquant will exit with status code 99. pngquant will use the least amount of colors required to meet or exceed the max quality. Min and max are numbers in range 0 (worst) to 100 (perfect), similar to JPEG.