Bookmarklet For Testing Graceful CSS3 Degradation: deCSS3

deCSS3 is a bookmarklet for testing your graceful degradation of CSS3 features.

Use this bookmarklet to get a whiff of what your site will look like on older browsers that don’t support CSS3.

deCSS3 saves time and let you see how well your pages are gracefully degrading without having to open up IE6-8.