This talk is about easy ways to reduce image sizes without compromising quality using open-source command-line tools you can easily automate. About 50% of the average web page is images, so by focusing on images, you have an excellent opportunity to improve page performance and user experience. You can save 20-30% of your bandwidth bill and improve response time with little or no code changes and your site will still look just as good.

Topics discussed:

• GIF vs PNG

• PNG8

• Truecolor PNG

• IE6 and transparency

• AlphaImageLoader and performance

• Optimizing PHP/GD-generated images, favicons, CSS sprites