Found via CSS Tricks , Benjaminkeen.com has a great bookmarklet for testing your responsive web design . Toss the bookmarklet in your toolbar, go to the page you want to test, and hit it. You’ll get your page in a series of common resolutions to see how it does. Essentially it sticks the pages in iframes of various common resolutions for tables, phones, etc.
Take a look at the bookmarklet code - it’s very easy to hack if you need to test different resolutions. All you need to do is adjust the iframe sizes.
1 2 javascript:document .write('<!DOCTYPE html><html><head><meta charset="utf-8"><title>Responsive Design Testing</title><style>body { margin: 20px; font-family: sans-serif; overflow-x: scroll; }.wrapper { width: 6000px; }.frame { float: left; }h2 { margin: 0 0 5px 0; }iframe { margin: 0 20px 20px 0; border: 1px solid #666; }</style></head><body><div class="wrapper"><div class="frame"><h2>240<span> x 320</span> <small>(mobile)</small></h2><iframe src="' + window .location + '" sandbox="allow-same-origin allow-forms" seamless width="240" height="320"></iframe></div><div class="frame"><h2>320<span> x 480</span> <small>(mobile)</small></h2><iframe src="' + window .location + '" sandbox="allow-same-origin allow-forms" seamless width="320" height="480"></iframe></div><div class="frame"><h2>480<span> x 640</span> <small>(small tablet)</small></h2><iframe src="' + window .location + '" sandbox="allow-same-origin allow-forms" seamless width="480" height="640"></iframe></div><div class="frame"><h2>768<span> x 1024</span> <small>(tablet - portrait)</small></h2><iframe src="' + window .location + '" sandbox="allow-same-origin allow-forms" seamless width="768" height="1024"></iframe></div><div class="frame"><h2>1024<span> x 768</span> <small>(tablet - landscape)</small></h2><iframe src="' + window .location + '" sandbox="allow-same-origin allow-forms" seamless width="1024" height="768"></iframe></div><div class="frame"><h2>1200<span> x 800</span> <small>(desktop)</small></h2><iframe src="' + window .location + '" sandbox="allow-same-origin allow-forms" seamless width="1200" height="800"></iframe></div></div></body></html>' );
