If you want to have dynamic images on your site, the web server in which you host it ought to have the proper software for that. As an alternative to using static images with a fixed size, you could have thumbnails and automatically resized images depending on the device a website visitor uses or you can even flip and invert images using a script app. All of these things are possible with ImageMagick and GD library - two pieces of software which could be installed on a web server and which work with a lot of widely used scripting languages including: Perl, Python and PHP. Thus, you can use images with any web-based app you'd like, no matter what language it was developed with - a custom-made Perl script or a PHP one. The 2 libraries will allow you to work with more than 100 different image formats including GIF, PNG, TIFF, JPEG, etc.