How to use the command 'zopflipng' (with examples)

ZopfliPNG is a PNG compression utility developed by Google. It offers an effective way to reduce the file size of PNG images while maintaining their quality. This command line tool can be used to optimize individual PNG files as well as multiple files with a given prefix.

Use case 1: Optimize a PNG

Code:

zopflipng input.png output.png

Motivation: The motivation for using this example is to optimize a single PNG file and reduce its size without losing quality. By running this command, the user can apply advanced compression algorithms to the input.png file and save the optimized version as output.png.

Explanation:

• zopflipng is the command itself.
• input.png is the input PNG file that you want to optimize.
• output.png is the output file where the optimized PNG will be saved.

Example output:

Optimizing input.png... done!
Output saved as output.png.

Use case 2: Optimize several PNGs and save with given prefix

Code:

zopflipng --prefix=prefix image1.png image2.png image3.png

Motivation: The motivation for using this example is to optimize multiple PNG files and save them with a common prefix. This can be useful when dealing with a batch of PNG images and wanting to apply the same optimization process to all of them.

Explanation:

• zopflipng is the command itself.
• --prefix=prefix is an optional argument that specifies the prefix to be added to the output filenames.
• image1.png image2.png image3.png are the input PNG files that you want to optimize.

Example output:

Optimizing image1.png... done!
Output saved as prefix_image1.png.

Optimizing image2.png... done!
Output saved as prefix_image2.png.

Optimizing image3.png... done!
Output saved as prefix_image3.png.

Conclusion:

The zopflipng command provides a simple yet powerful way to optimize PNG files. By using it, users can reduce file sizes without compromising image quality. Whether optimizing one file or many, this command can be a valuable tool for anyone working with PNG images.