Windows Media Player HTML5 Extension for Chrome

The Windows Media Player HTML5 Extension for Chrome is an extension that enables Chrome users to play H.264-encoded videos (aka MP4) on HTML5 pages by using the built-in capabilities found in Windows 7.

Supported Platforms
  • Requires Chrome 8.0 or later
  • Windows 7

We are working on getting the extension submitted to the Chrome store. For now you can install the extension following these instructions:

1. Download the extension from here (right click and "Save Link As...") and save it on your local machine.

2. in Chrome, select the Chrome menu/tools/extensions.

3. You will need to check the developer mode box to install the extension.

4. Drag&Drop the extension file on the extensions page. Chrome will ask you to install the extension.


Windows Media Player HTML5 Extension for Chrome Release Notes



A copy of the license agreement is available here (A copy of the file is also installed with the Add-on).

Release Notes for Developers

This Extension is based on a Chrome Extension that parses HTML5 pages and replaces Video tags with a call to the Windows Media Player plug-in so that the content can be played in the browser. The Extension replaces video tags only if the video formats specified in the tag are among those supported by Windows Media Player. Tags that contain other video formats are not touched.

The Extension also checks if the browser version already supports MP4 (H.264) video codec, if so the extension is not used.

The current version of the Extension still uses the Windows Media Player Plug-in APIs to control video playback, so there are some differences between the methods/properties defined in the emerging HTML5 standard and those available in the Windows Media Player plug-in. We are working to fix this limitation in the next release.