Format your email for mobile

Business Benefits

Improve engagement and click-through rates on mobile devices.


Create subject lines no more than 50 characters long.

On mobile devices, subject lines longer than 50 characters are cut off and only partly visible.

If you are using emojis in your subject line, check how they render on mobile devices.

Certain emojis will not render on mobile.

In the content of your email, keep titles under 24pt, and body text to over 14pt.

Text smaller than 14pt is difficult to read on mobile devices, and titles over 24pt can create formatting issues like run-on lines. If your title is short, you can increase the text size to over 24pt. However, if your title is more than 4 words, you should keep it at 24pt or below.

Add alt text to all images by clicking on any image and opening image options.

If your image contains important information, reiterate this information as text in the email. Often images will not be automatically displayed on mobile devices.

Make call to action instructions stand out by making them buttons.

Do this by dragging a button block onto your template and inserting a link. It is much easier to click a button on a mobile than a hyperlinked word. It’s ok to hyperlink words in your copy, but you should also provide a call to action button somewhere in the email, for easier clicking

Add inline breaks and paragraph breaks between different pieces of content or media.

You want to ensure the users have room to scroll and click, and that the layout does not become overwhelming on a small screen. Content without sufficient spacing can look very cluttered on small mobile displays. Consider increasing text height spacing to 1.5 line spaces. You can do this in your text editor by navigating to formatting options.

Test your emails on different devices and inboxes.

You can do this manually by reading the email on different devices or use a third-party inbox tester provider. Litmus is an excellent inbox tester that will show you how your emails render across all devices and inboxes.