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How to identify the font rendered in your Browser?

Track down fonts rendered on a web site sometimes can be challenging. Reply purely on the font family is not a safe bet. The network trace only shows that the font has been downloaded but not that it will be used and applied correctly.

Luckily, the latest versions of all major Browser offer now especially support that makes it easier to identify the real applied font. Besides, never trust what you see in the Browser; it might be something that sits only on your client.
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Things you should know about web fonts and font packages

During the last years I’ve intensively used web fonts. Since I published the first blog post on how you use web fonts in SharePoint 2010.
While I just downloaded the web fonts and used the CSS that was included in the font packages I recognized more and more that most of the available web fonts are wrong defined inside the font packages. There are a couple of problems with the definitions of the @fontface that you can avoid creating a cleaner style sheet.

Roboto font

Roboto font

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Office 365 Icon font documentation

I’m not quite sure when it happened. During the last twosome of months, Microsoft provides some icon fonts in Office 365.Especially the newly introduced app launcher makes use of icons of this typeface.The content varies from icons, such as the Hamburger menu, arrows, general, UI elements, as considerably as all Microsoft Applications. The files of this font are hosted on the Microsoft CDN so they are ready to use to spice up Apps.

Office 365 Glyphs - Preview

Office 365 Glyphs – Preview

Why to use icon fonts?

Icon fonts provide a couple of benefits. Fonts are scaled better than any image across different screen resolutions and even looks great on high density displays without any loss of quality.
There is another advantage to use this font. By using the same icons as in Office 365 you will be able to provide a consistent user experience.
Microsoft created a while ago some UX Guidelines for Apps in SharePoint, but you won’t find any information on the icons.

How to get access to the icon font of Office 365?

As mentioned earlier CDN is the key. Microsoft provides some centralized assets there. There is only one problem the use of a CDN is mostly undocumented. One general documentation can be found on the MS Technet.
There are several CDN endpoints and in case of SharePoint only one url exist in Office 365 for a long time. This URL is // This url can be accessed via http (port 80) and http’s (port 443).
To make use of the icon font the following code needs to be used in your courses.

@font-face {
    font-family: "SPO365Icons";
    src: url("//");
    src: url("//") format("embedded-opentype"), 
         url("//") format("woff"), 
         url("//") format("truetype"), 
         url("//") format("svg");
    font-style: normal;
    font-weight: normal;

You might recognise the path in there that points to “_layout/15 “ which is the current version of SharePoint. The path before the layouts fairly undocumented and might change over time. I try to maintain those urls in future until there is an official documentation available.

Content of the icon font

The font-face definition can be added to the custom style sheet of your app. Again the content of this font is undocumented as well.
This was the reason why I set up a small interactive documentation that use the CDN urls and shows all relevant icons. So you don’t have to search all the 65536 glyphs (or characters).
The guide be found on my newly created lab site under the url
A page that I’m looking forward to maintain in the future and add some additional information and things there.
Following the principles of “Ship or die”. The mobile support is currently beta too. I’m looking forward to provide a superb user experience.
If you have any comment, suggestion how to improve. Please feel free to comment. I will be lucky to hear from you.