Simon Willison’s Weblog

Placehold.it. Useful dynamic image generator for layout mockups—just drop an image in to a page pointing at http://placehold.it/300x200. Takes optional arguments for text, colour and format as well.

# 20th March 2010, 2:32 pm / design, images, layout

Em Calculator. Tool for working out CSS relative em values, useful for creating completely resizable layouts.

# 6th February 2007, 2:03 pm / css, ems, layout