optipng bin-wrapper that makes it seamlessly available as a local dependency
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readme.md

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OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information

You probably want imagemin-optipng instead.

Install

$ npm install --save optipng-bin

Usage

const {execFile} = require('child_process');
const optipng = require('optipng-bin');

execFile(optipng, ['-out', 'output.png', 'input.png'], err => {
	console.log('Image minified!');
});

CLI

$ npm install --global optipng-bin
$ optipng --help

License

MIT © Imagemin