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The Internet Explorer Developer Toolbar provides several features for exploring and understanding Web pages. These features enable you to:

• Explore and modify the document object model (DOM) of a Web page.
• Locate and select specific elements on a Web page through a variety of techniques.
• Selectively disable Internet Explorer settings.
• View HTML object class names, ID's, and details such as link paths, tab index values, and access keys.
• Outline tables, table cells, images, or selected tags.
• Validate HTML, CSS, WAI, and RSS web feed links.
• Display image dimensions, file sizes, path information, and alternate (ALT) text.
• Immediately resize the browser window to a new resolution.
• Selectively clear the browser cache and saved cookies. Choose from all objects or those associated with a given domain.
• Display a fully featured design ruler to help accurately align and measure objects on your pages.
• Find the style rules used to set specific style values on an element.
• View the formatted and syntax colored source of HTML and CSS.

The Developer Toolbar can be pinned to the Internet Explorer browser window or floated separately.
Your feedback is greatly appreciated. Please visit the IE Web Development Forum on MSDN to enter bug reports, comments, and suggestions.

Files

Status: Deleted This download is no longer available on microsoft.com. The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to January 2016.

Files
IEDevToolBarSetup.msi SHA1: 4d1af72fcbfe3ef1570d3b21ef8b58b357e3ec9a Size: 424 KB

File sizes and hashes are retrieved from the Wayback Machine’s indexes. They may not match the latest versions of files hosted on Microsoft servers.

The Developer Toolbar is not compatible with Internet Explorer 8. Please use the developer tools included with Internet Explorer 8.  Press F12 or click the 'Developer Tools' entry in the Tools menu to begin using the tool. 
Click here for more information on Internet Explorer 8 Developer Tools.

After installing the Developer Toolbar, restart Internet Explorer and click the Developer Toolbar icon in the command bar to display or hide the Developer Toolbar.
You can also open the View menu and then use the Explorer Bar menu. In Internet Explorer 7, open the Tools menu and then use Toolbars->Explorer Bars to display or hide the Developer Toolbar.