Posts tagged ‘image files’

Optimize all your PNG and JPEG images with one command using imgopt

Here’s something useful for the web developers out there. It’s a script I’ve been using for a while that makes it super-easy to losslessly compress entire folders of PNG and JPEG files for the web.

If you’re familiar with PNG optimization, then you know about programs like advpng, optipng and pngout that optimize and recompress PNG files, making them much smaller than the likes of Photoshop can. My shell script combines all three of these utilities to achieve minimum file size, while hiding their command-line syntax and adding the ability to recursively process entire directory trees.

And, it works with JPEGs, too! It uses jpegtran (included with libjpeg) and another small utility I’ve included to optimize and strip all metadata from JPEG files. Since my script searches directories recursively, all you need to do is type, say, imgopt myproj/htdocs and it’ll take care of your entire website.

All compression is lossless, which means no pixels are changed and no information is lost, the files just get smaller — chances are your layout can shrink by as much as 50%, which is like getting free bandwidth, and it means your site will snap into place that much faster for users. more …

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