I have a high tolerance for tinkering with tools. When folks see my desktop they often say, “What’s that?” So today begins a new blog feature called Tool Tuesday. Once a week I’ll feature an online or mobile tool I actually use and recommend. I hope you find it useful. -kk

MeasureIt is a Firefox add-on that lets you draw a ruler across any webpage to check the width, height or alignment of page elements in pixels.

I use it at least once a week to size photos to e-mail and website columns. Light, fast and easy, MeasureIt sits in your Firefox status bar, at the bottom left of your browser. [HINT: In Firefox go to View > Status Bar to make it visible.]

Click on the link below for a 12-second tutorial screencast.

What tool do you use to do this kind of thing? Share it in comments.