Placehold.it

Placehold.it is a very useful tool for wire-framing, layout design, and early development.
All you have to do is use "http://placehold.it/" as the src in the img html tag, and enter a size at the end of the URL, for example 350x150. See example below.

<img src="http://placehold.it/350x150" />

Placehold.it is a quick and simple image placeholder service.

Placehold.it