 <p><em>Earlier &amp; later versions of Chrome may be slightly different</em></p> <p><strong>Chrome v50.0.2661.102 m</strong></p> <p>To open Chromes developer tools (<em>several options</em>):</p> <ol> <li>Menu -> More Tools -> Developer Tools </li> <li><code>Ctrl + Chift + I</code> </li> <li>Hit the <code>F12</code> key</li> </ol> <p>Once open, select the <strong>Network</strong> tab, select the name of the resource on the lefthand side, then hit the <strong>Headers</strong> tab. Under <strong>Response Headers</strong> find <strong>Content-Type</strong> which is your mime type. </p> <p><a href="https://i.stack.imgur.com/A1Lui.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/A1Lui.png" alt="enter image description here"></a></p> <p>With images you can select the <strong>Preview</strong> tab and you will be able to see some information about the resource, including the mime type, located at the bottom of the developer window.</p> <p><a href="https://i.stack.imgur.com/JOdHN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JOdHN.png" alt="enter image description here"></a></p>