How long should the title tag of a website be?

For desktop, keeping the title tag of a page below 65-70 characters in length is optimal. Anything above that may not display properly. There isn’t an exact character limit but most search engines will cap it at 600 pixels.

The example below shows a title tag that is over 70 characters for the search term “SEO Tools”. As you can see Google has truncated the listing with the deadly three dots.

Below is the actual title tag and what they missed on the listing. Rearranging and shortening the text in the title may help CTR. The text “(No Download)” may be all it takes to get a few extra clicks.

For mobile devices, website owners have about 78 characters to work with. As you can see below the same problem occurs. Even with 78 characters to work with the mobile title tag still is showing a truncated version.

Since you can’t really differentiate a title tag by device it’s best to keep your titles under 70 characters or 600 pixels to be safe.