https://b.hatena.ne.jp/entry/s/webdesignerdepot.com/7-free-tools-for-testing-responsive-layouts/ Every website should be designed with a responsive approach. To keep you on the right track, testing early and often, with any of these responsive testing tools, will ensure that your design looks ... https://b.hatena.ne.jp/hatano99/20171031#bookmark-346882415 2017-10-31T06:32:17Z free device Web screen mobile Common smartphone