Whether you are an experienced Web programmer or just starting out, you know that there are many browsers currently in use and have probably had experience with the cross-compatibility issues. The frustration of building a beautifully functioning website using Firefox, then discovering it doesn’t render properly in IE6 is a definite learning experience. Testing your creations in as many browsers as possible is crucial to turning out a professional product.

There are a multitude of tools available to allow cross-browser testing with only one computer and your favorite browser. Many of them will let you do online testing of multiple versions of the most commonly used browsers and some will include applications you may never have heard about. A few require downloading and installation on your machine.