Meet the DOM Monster!


DOM Monster is our answer to JavaScript performance tools that just don't give you the full picture.

DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of health.

If there are problems, DOM Monster will point them out—and even make suggestions on how to fix 'em.

Drag the DOM Monster! to your bookmarks bar!

DOM Monster! is the brainchild of Amy Hoy and was programmed by Thomas Fuchs.

We'll keep the DOM Monster! up to date and feed it with the latest in page analyzing features for you! You don't have to update or reinstall the bookmarklet to always get the latest and greatest version! Be sure to drag the DOM Monster! to your bookmarks bar in all browsers you want to test in!

The DOM Monster is open source. Contribute your own tips and tests. Visit the DOM Monster repository on GitHub.

JavaScript Rocks! Learn more about the DOM Monster! and how to deal with DOM and JavaScript performance issues! Grab a copy of our
JavaScript Rocks! performance ebook.