KHTML is the HTML layout engine developed by the KDE project. It is the engine used by the Konqueror web browser, and a forked version (WebKit) is used by Apple's Safari web browser and Google's Chrome browser.

The following standards are supported by the KHTML engine:

* HTML 4.01
* CSS 1
* CSS 2.1 (screen and paged media)
* CSS 3 Selectors
* CSS 3 Other (multiple backgrounds, box-sizing and text-shadow)
* PNG, MNG, JPEG, GIF graphic formats
* DOM 1, 2 and partially 3
* ECMA-262/JavaScript 1.5
* Partial Scalable Vector Graphics support