IE10 Platform Preview 2, the same HTML5 engine seen in the recent public “Windows 8” demos, is now available for download. With this update, IE10 continues to deliver support for site-ready HTML5 technologies as well as improving performance:

With the second Platform Preview, developers can start working with several site-ready HTML5 technologies for building beautiful, interactive Web applications with great performance and security. You can read the full list here in the IE10 developer guide:

• Beautiful and interactive Web applications are easier to deliver with support for several new technologies like CSS3 Positioned Floats, HTML5 Drag-drop, File Reader API, Media Query Listeners and initial support for HTML5 Forms.


• HTML5 Application performance improves across the board, as well as the ability to deliver better performance with more efficient use of battery life with new technologies like Web Workers with Channel Messaging, Async script support, and others.


• Web application security improves using the same markup with support for HTML5 Sandbox for iframe isolation.

IE10 continues IE9’s precedent of enabling Web applications to do more in the browser without plug-ins. It also continues the pattern of offloading work to the parts of a PC that are best suited for them, like the GPU for graphics, and different processor cores for background compilation of JavaScript.