I’ve been inspired by a few different articles to experiment with font stacks, but I wanted a way to quickly see how different font families looked within the context of my design right in the browser. For instance, how well does Georgia work as a fallback for Constantia? (Pretty well.) How similar are Helvetica Neue and Helvetica? (The leading is surprisingly very different.)
To this end, I’ve released a bookmarklet that aids in the process of testing out different fonts. You can start using it right now by dragging it to your bookmarks toolbar:
You can start using it immediately, or see the project page for more info.